Youtube comments of (@doktorbimmer).

  1. Today marks the 7th anniversary of the end of RX production, on Thursday June 21, 2012 at 4:30pm the final RX-8 car ever to be produced rolled off the assembly line, the last RX model to ever be produced by Mazda.
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  2. R.I.P. "Rust in Peace" Wankel engine... 1964 - 2012
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  3. Dick Pickles Well first off, regardless of proprietary nomenclature used by a former manufacturers... Wankel KKM engines have PISTONS... not Rotors. Each piston has 3 sides and 3 combustion chamber faces Each displaces an interior volume minus the unswept volume due to the stroke of the crankshaft. For a Mazda 13B engine for example this volume is 650cc despite the "published displacement" used for tax purposes the actual displacement is 650cc X 6 =  3.9 lites of total displacement Of course only 2 chambers can be on the intake stroke and 2 on the power stroke per revolution of the crankshaft, a '2X conversion formula' is then used when comparing the displacement to, for example a Otto or Diesel type engine. Making the displacement approximately 2.6 liters in relation to current existing standards. I hope that answers your question.
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  4. This week marked the 10 year anniversary of Mazda's board cancelling the RX brand and further development of Wankel engines. The RX brand's bad reputation for unreliability and poor fuel economy saw sales in a steady decline as far back as 1986 with the last two RX model suffering a net loss for the company... it is estimated that the RX-8 lost nearly $3 billion dollars in development, production and warranty costs that bankrupted the company for the third time in its history. As part of the government bailout loan deal Mazda agreed to cancel development of the unprofitable Wankel engine and drop the failing RX brand.
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  5. +n3kbrEak3r 2.6 liter when you compare it to Otto or Diesel engines... so 200hp doesn't sound that great really...
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  6. Wankel engine...
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  7. Today is the anniversary of the death of the poor Wankel engine, 4 years ago today June 22, 2012 at 4:30pm the Wankel engine assembly plant at Mazda's Ujina #2 shut down and shortly there after was dismantled to make way for a brand new engine assembly facility at Ujina #2 specifically designed to manufacture Mazda's successful new signature Skyactiv-G ® line of reciprocating Otto type engines
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  8. @Bill Luo While it is a common urban myth that the RX-8 was canceled because of emissions, this is simply not true.. The RX-8 continued to pass the world's toughest emissions standards (EPA Tier2 Bin5 AND the strict California CARB ULEV II right up until lack of sales ended production. Sales of the RX-8 were so low in Europe there was simply no reason to justify re-certifying the RX-8 to meet the Euro5 emissions standards as they would never sell enough units to recoup the costs incurred.
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  9. +foobar201 Wow, a beautiful and very interesting design... I have never seen anything quite like it before.. very cool.
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  10. The "effect combat range" of the L85A2 typically drops to as little as 30 meters... which is about as far as I can throw it after it jams.
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  11. I have given many tear-down demonstrations of the MG-34 over the years... you did an excellent job... couldn't have done it any better myself, good work.
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  12. This month marks the 10 year anniversary of Mazda's decision to kill-off the RX-8, the entire RX brand and cancel further development of production Wankel engines... its been a quarter of a century now since Mazda unveiled a new production Wankel engine.
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  13. Today marks the 6th anniversary of the end of RX production, on Thursday June 21, 2012 at 4:30pm the final RX-8 car ever to be produced rolled off the assembly line, the last RX model to ever be produced by Mazda.
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  14. 2006 and later were reflashed to have less power.... in an effort to reduce premature engine failures.
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  15. @John Burns Indeed johnny... money and resources that would not have made any return on their investment. Mazda is a company that needs to develop cars that will actually sell... if not they will cease to exist as a company.
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  16. The salesman at the Mazda dealer didn't scream... he very politely said that Mazda does not make Wankel engines anymore....
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  17. Very poor efficiency which is why they are obsolete now...
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  18. @John Burns The RX-8 MET OR EXCEEDED EPA Tier2 Bin5 AND the strict California CARB ULEV II right up until lack of sales ended production.... it would have easily passed and exceed Euro5 standards...
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  19. @Isaac Rodriguez Value is generally an expression of cost or supply vs. demand, not importance. The Pontiac Aztec sold for around $20,000 USD and GM sold nearly 120,000 units While the FD sold for around $40,000 and Mazda sold a little more than half that number... Supply is low and demand is high thanks to a campy, teen car film called "Fast and the Furious" Mazda's RX-7 FD is featured in almost every episode of the action film series and became a seminal icon for millions of pubescent males around the world... The film's status however is not associated with the car's "importance" in the real world of automobile design.
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  20. +Mark Wright All Wankel engine are 4-stroke, Pre-mixing is not only NOT RECOMMENDED and a waste of time and money, It DOES NOTHING to prevent seal damage and actually makes the reliability problems WORSE... Tampering or disabling the OMP is also MONUMENTALLY DUMB and can DESTROY YOUR ENGINE!!!!
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  21. Matthew Barnard LOL..!!! A 34 year old, data analyst from Rhode Island with no engineering degree and absolutely no employment experience in the automotive field is the foremost accomplished and definitive "expert" on Wankel KKM-57 engines???  That's rich!
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  22. +Der Panda But Wankel engines are not 2-stroke... everyone knows these engines were extremely unreliable and inefficient.
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  23. @IfYouDisagreeYouAreWrong There were 100 million new cars sold last year... none of them had a Wankel engine. Don't believe me? Go down to your Mazda dealer and see for yourself!
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  24. If you are here illegally you are a criminal... the judge should go to jail.
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  25. DoomsdayMelody91 You can buy a new car with up to 200 hp per liter... and you can't buy a Wankel powered car anymore.. its obsolete now
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  26. Wtf? An 8 rotor??? that would just be 400% more likely to suffer apex seal failure...
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  27. foobar201 Yeah... I think I carved a buttstock out of one once..
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  28. The power of two horses... the torque of a dead hamster.
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  29. @Isaac Rodriguez Its a moot point really, they were both hideously fugly and commercial sales flops... both cars were failures and no longer made. Both brands no longer exist, the GM's Pontiac and Mazda's RX brands were permanently discontinued.
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  30. @Onii-chan WRONG! Mazda's board of directors voted in May 2009 to permanently discontinue the RX brand, production ended on June 22nd, 2012 at 4:30 pm Tokyo time. The RX brand has been discontinued for over 7 years.
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  31. Shikamoo P.K. Interesting...  but most of the problems associated with the RX8 engine are the same problems found on all Wankel type KKM engines regardless of the oil type used. 
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  32. It looks like a shed!
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  33. @IfYouDisagreeYouAreWrong 1990???? Dude that was a vintage car a decade ago...
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  34. The Wankel engine is not a player in the engine manufacturing industry anymore... its an obsolete design because it was inferior to reciprocating technology.
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  35. DR. Wankel had nothing to do with this engine... in fact he hated this engine.
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  36. @tmac20031 This engine is not running on gasoline... its running on nitromethane.
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  37. Well, no one will ever accuse you of being an engineer...
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  38. Jack Sparrow I think its pretty obvious that a "conventional" breech-loading metallic cartridge shotgun design from this era would be a break-action design.. 
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  39. +Kurt Phillips Brutally honest people often are... you must be one of those people that are not accustomed to hearing the truth.
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  40. @riderthewake02 Mazda's new CEO confirmed last week in an interview that his company has no plans to bring back the Wankel engine.
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  41. @IfYouDisagreeYouAreWrong Wankels are definitely not made anymore either...
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  42. @IfYouDisagreeYouAreWrong Wankel engines are obsolete because they are inefficient and unreliable... they could not compete with the other types of vastly superior internal combustion engines.
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  43. Nah, just someone that understands the insurmountable Specific Energy limitations that will forever plague rechargeable battery technology.
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  44. No, I just understand the Laws of Electro-Chemistry that regulate the limits of rechargeable battery performance... you might want to read a few books or work on that engineering degree before you continue to make a fool of yourself...
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  45. Matthew Barnard Oooh! I see, so being a respected forum member makes him an engineering and automotive expert??? Hahahahaha!!! l
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  46. +Mark Wright Anyone that pre-mixes or any of the other of the stupid old wives tale myths about preventing apex seal failure? Does not understand the primary failure mode of the apex seals in a Wankel KKM type engine.
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  47. @David Johnson You sir clearly have no clue what you are talking about... it is very apparent from your feeble remarks that you are not sufficiently educated nor experienced to speak intelligently on this topic... please refrain from posting any further false or erroneous rumors regarding Wankel engines in particular false rumors about pre-mix lube oil in engines specifically designed to use metered oil injection.
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  48. Tubular Pencil Damn straight kid, who the fauq would buy one of these POS today????
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  49. @riderthewake02 You do realize Wankel engines are obsolete and Mazda stopped development of production Wankel engines a decade ago?
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  50. @riderthewake02 The Wankel engine was a commercial failure in every application except automobiles... Mazda was the very last engine manufacturer producing them and they ceased all production several years ago.
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  51. @riderthewake02 99% of all patents never become a successful commercial product... Ford once held more patents for the Wankel engine than any other engine manufacturer in the world (including Mazda) but Ford never sold Wankel engines.
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  52. @John Burns Europe is nearly half a century behind the United States which introduced vehicle emissions standards in the 1960s.
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  53. Skyactiv-G and Skyactiv-X technology requires high static compression Ratios... anyone familiar with Wankel engine should know that this is simply not possible because of the Wankel KKMs seriously flawed and limited combustion chamber geometry, CRs above 12.5:1 cause serious disruption of proper ignition flame propagation and deflageration making the designs poor combustion efficiency issues even worse. Mercedes-Benz exhaustively studied and developed GDI fuel injection systems with the Wankel engine in the late 1960s and found the CRs too low to effectively adapt Stratified Charge Mode Combustion and several other manufactures such as Rolls-Royce, Deutz, Yanmar, MAN, Krupp and John Deere studied Direct injection Stratified Charge operation with the Diesel Cycle and all failed to produces a commercially viable engine for these exact same reasons. Mazda's Skyactiv-X technology utilizes a modified Miller Cycle and variable valve timing in order to actively control Dynamic Compression Ratio something not possible in a fixed port induction design such as the Wankel KKM so any suggestion that Mazda is working on a similar system for the Wankel engine is simply ridiculous and without any technical merit.
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  54. Good point, the tires are completely irrelevant, its the engine that caused this car to be a failure.
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  55. Shikamoo P.K. From an engineering prospective, chemical analysis of motor oil can prove without a doubt that contaminated or expired lubricants is not the cause of premature apex seal failure, nor is it the cause of the characteristic short service life..  also from a strictly engineering prospective, engineers do not use  the term "Rotary" to describe the Wankel engine... it is in fact not a Rotary engine at all, so in the context of an engineering discussion... you sound a bit foolish when you do. Cheers!  
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  56. +Taylor Latch That is completely wrong Taylor, All Wankel engines are 4-stroke and use the same 4-stroke operating principle as the Otto engine. Wankel engines are fundamentally different than 2-stroke engines which combine 2 cycles together at the same or overlap significantly. Port induction can be found on both 4-stroke reciprocating engines as well as the 4-stroke Wankel engine.
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  57. +Lawson Palmer The Mazda 13B series has a total, true displacement of 3.9 liters, even when compared at the same 720° firing order as a reciprocating engine its displacement is 2.6 liters... either way you calculate the displacement... the Wankel has a much higher BSFC (fuel consumption per horsepower) and higher EGTs (higher heat rejection) indicating an engine with much lower Carnot Cycle efficiency than a comparable reciprocating engine.
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  58. @TRout The Wankel was plagued by several serious, inherent flaws in its basic design concept that significantly reduced its ability to run as clean and efficiently as reciprocating engines can... which is why the Wankel never replaced reciprocating engines and has been obsolete for several years now.
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  59. 2 horsepower 0 torque
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  60. Your baby is rotarded... a tragic genetic birth defect that has finally been eradicated from the automotive industry.
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  61. @renatinhoss Clearly you are not familiar with the history or development of the Wankel type KKM engine, it was originally intended and specifically designed to use gasoline as its primary fuel type, this fuel is also the best available fuel type for this engine. Many attempts have been made since 1960 to develop the Wankel KKM and adapt it to use alternative fuels, all have been unsuccessful... the Graupner GmbH. model 49 PI was never a popular or successful design and was discontinued many years ago.
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  62. @Isaac Rodriguez What's the matter kid? Can't handle the TRUTH!!!
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  63. Shikamoo P.K. Well its true there are some things that are particularly bad for a Wankel engine... but there is no effective regimen of preventive proceedures that will make your engine last longer... its all just wishful thinking and old wives tales. 
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  64. +tony james Mazda never fixed the premature engine failure problem with the RX-8... they reduced the horsepower output to minimize the failure rates but in countries that Mazda offered a warranty the company was losing money at a staggering rate not to mention damage to the companies reputation. By 2009 the problems were so bad Mazda's board voted to cancel development of a replacement engine and set a date to cease production in 2013... although sales continued to crash faster than predictions the deadline was moved up 6 months earlier to June, 2012..
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  65. tyler white Good luck with that..    Me too! my favorite Rotary engine is the 9-cylinder Oberursel UR.II.
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  66. Unfortunately they were far too expensive and had terrible fuel mileage.
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  67. The real problems in Mexico have nothing to do with Coca-Cola... don't make it a scapegoat for government corruption and local criminal activity.
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  68. +sproly born NO, they are not... there are NO FAA or EASA certified flight worthy engines in production and there has NEVER been a production airplane that used a Wankel engine.... Wankel engines are particularly unsuitable to aircraft applications due to there horrendously bad BSFC (fuel consumption per horsepower produced) and their horrible reliability that renders them completely unsuitable to meet even the minimum PTFR and TBO standards required by the civil and commercial aviation industries...
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  69. Wankel: What's reliability
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  70. Or maybe batteries still suck?
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  71. +Tam Ago General Motors built its own Wankel engine and put it in a Corvette... it sucked and GM dropped it like a bad habit!
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  72. Weston O'Connor Looks like its been around for a while and it still works... so much for your theory...
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  73. Did anyone count how many times Adam stroked his beaver?
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  74. Its still not commercially viable!
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  75. I'm sorry you live in fear of things you do not understand.
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  76. They don't teach obsolete engine designs in technical schools
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  77. I'd rather have the freedom to make my own decisions than have the government make them for me.
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  78. The only crime here is the wealthy elite using false hysteria about global warming to steal money from the people of France.
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  79. @Isaac Rodriguez The facts are irrefutable...
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  80. @Isaac Rodriguez The Facts speak for themselves kid... some day when you grow up you might understand... until then you can just continue to publicly embarrass yourself.
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  81. I hear that some day people will be able to get into their internal combustion car and start it with just a push of a button... no hank-cranking required!
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  82. Unfortunately Felix Wankel's engine design was a complete failure.
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  83. Looks like they already have...
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  84. John doesn't understand why Wankel engines are no longer made...
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  85. The Miles M.52 was cancelled because Frank Whittle failed to produce the supersonic capable engine he had promised... Whittle was at this time deep in the grips of drug and alcohol addiction and would be removed from his own company when the program was cancelled. Whittle would be exiled to drug rehab in America to save the new government any further embarrassment...his reputation among his peers so tainted he would never work in the british aerospace industry ever again.
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  86. Joseph Carprpenter That would be very cool if it was real... but its not. The RX-Vision is just a Concept and its engine does not exist.
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  87. Rutger Hauer's lines in Blade Runner for the death scene was pure genius...
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  88. @dominic draughn The actual displacement is not 1.3 liters.... the total displacement is 3.9 liters or 2.6 liters when comparing it directly against reciprocating 4-stroke Otto Cycle engines using the common FIA/ SAE "2X" conversion formula.
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  89. chrischoy9 Ahhhh... NO! 
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  90. Humans are Omnivores, this is a scientifically proven fact... there are several amino acids that humans cannot produce on there own and can only get from animal protein.
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  91. The racing heritage is rather unremarkable.... There is a good reason why they don't make them anymore... and its because you haven't driven any really good cars lately you wouldnt still thinking this way. Cheers!
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  92. +swedish gaming The Wankel is notorious for poor reliability and short service life... Removing the engine and doing a complete tear-down IS NOT Maintenance... its called engine failure
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  93. Sodium-Sulfur batteries??? Another false promise of better battery performance in the future...
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  94. @riderthewake02 Still no Wankel engines coming... looks like you are wrong again.
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  95. @Axel bodat Wankel engines were never banned by the FIA in WSC endurance racing and they were not banned In Indy Pro Mazda either.. Mazda voluntarily retired Wankel engines in both race series
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  96. Certainly is inferior, that is why the Wankel was a commercial failure and has been obsolete in the engine manufacturing industry for many years.
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  97. Today marks the 7th anniversary of the final demise Mazda RX production, on Thursday June 21, 2012 at 4:30pm the final RX-8 car ever to be produced rolled off the assembly line, the last RX model to ever be produced by Mazda.
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  98. Greedy EV companies... Elon Musk is now worth $21 BILLION... you think he gives a shit about the environment? Only if it makes him another Billion!
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  99. Followed by the screeching sound of broken apex seal chucks grinding into the housing walls...
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  100. +shepd3 What is a carburetor????
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  101. +John Burns Really? Then why was Mazda rebuilding over 5,000 RX-8 warranty replacement engines every year due to apex seal failure?
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  102. Battery powered electric vehicles will remain a niche market product... they simply cannot replace ICEs in all applications.
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  103. +MetallicReg No, you are the one mixed up. Over 100 million cars were sold this year with Internal Combustion Engines... 99% of all global sales. EVs are the niche market and sales growth remains relatively stagnant.
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  104. The Wankel engine is dead... its not coming back.
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  105. If you think batteries are the answer? You clearly do not understand the problem.
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  106. This month marks the 10 year anniversary of Mazda's board cancelling the RX brand and further development of Wankel engines. The RX brand's bad reputation for unreliability and poor fuel economy saw sales in a steady decline as far back as 1986 with the last two RX model suffering a net loss for the company... it is estimated that the RX-8 lost nearly $3 billion dollars in development, production and warranty costs that bankrupted the company for the third time in its history. As part of the government bailout loan deal Mazda agreed to cancel development of the unprofitable Wankel engine and drop the failing RX brand.
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  107. +sproly born The irony of this story is Rotax who's parent company Sachs was one of the first companies to license production of Wankel engines on Dec. 29th 1960... was also one of the first Wankel licensee's to abandon production of Wankel engines in 1977.
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  108. The engine, it has a notoriously bad reputation for engine failures, premature compression loss due to damaged seals... this is a common problem that requires expensive engine overhauls or replacement... which in most areas will cost more than the value of the vehicle itself. Most of the "bargains" you will see listed for sale will most like be suffering from the early to advanced symptoms of this failure... hard starting, flooding, low power and poor fuel mileage.
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  109. The Wankel engine is lame
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  110. Electric cars were invented over a 130 YEARS AGO and reached their peak of popularity in 1915... that same year Charles Kettering invented the electric starter for internal combustion cars and the EV Industry all but died out completely with in just a few years.
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  111. Mazda doesn't make Wankel engines anymore, this month marks the 10 year anniversary of Mazda's cancellation of the RX brand and further development of production Wankel engines.
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  112. I still remember a time when the crazy people were only concerned with flying saucers and UFOs... now they have climate change to be hysterical about.
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  113. SidewaysGts is one of those angry little trolls you hear so much about.
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  114. Rest in Peace Wankel engine... 1964 - 2012
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  115. Mazda's cars are turning its drivers gay... if they weren't already!
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  116. Winston for President
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  117. DoomsdayMelody91 The Wankel when it was in production produced very uncompetitive torque output and torque curves compared to a 4- cylinder Otto type engine. particularly when comparing torque-per-liter output and lower rpm band output.  There has been a lot of speculation.. but no evidence as such.. the RX-Vision was merely a concept vehicle, a 3-dimensional model produced to demonstrate a new or revised styling concept.. not a new powertrain. You seem to be unaware that the 16x engine program was CANCELLED over 7 years ago.. Mazda made several attempts at producing turbocharged production models.. unfortunately.. unlike Otto and Diesel engine turbocharging does not significantly improve the efficiency of the Wankel.. and its poor torque curve and extremely high EGTs also made it a poor choice for turbocharging, particularly where reliability is concerned.  
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  118. Yeah... its a 3.9 liter with 200hp.. and with the MPGs of a car that makes 600hp!
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  119. +Gábor Angyal yeah, rev it to let the sound and the apex seals out...
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  120. +Phil Evans 'Miss Shilling's orifice' did nothing to fix the stalling problem.. it only addressed the flooding issue that could lead directly to the aircraft crashing due to loss of power.. Only the American Bendix-Stromberg PD-18 pressure-feed carb developed for the Packard V-1650 cured the flawed R-R Merlin.
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  121. @KKPlays [GD] That's right chico... the TRUTH! and don't you forget it.
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  122. +john james That is right John, its not a real hemispherical type chamber. Fiat is very careful to only use the word HEMI ® in all caps its a brand name
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  123. Rahul Namboodiri Its dead.. been dead for years
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  124. +Jon The Destroyer Daimler-Chrysler was careful not to use the word "hemispherical" Only its brand name HEMI® in all caps
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  125. +Tony Kindt Bullshit! Its not a plane engine??? The Wankel has never been successfully used in production aircraft design.. Its far too inefficient and unreliable for aircraft use. 250-300k miles out of a Renesis engine?????? Please, stop pretending to know what your are talking about, and stop doing drugs kid.. they are turning your brain into mush!!!
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  126. Many WW1 aircraft had horizontal stabilators... The Wright Flyer had them too
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  127. No one wants to hear about premature engine failure due to compression loss... but that is what they are famous for...
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  128. Port induction and Oil Injection/pre-mix fuel are not unique features of the 2-stroke operating principle... it only matter if the 4-cycles are combined/overlap or occur completely separately which defines the difference. Cheers!
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  129. EXCELLENT! You are a quick learner indeed..to make that analogy means you understand the concept now... YES, in that regard the Wankel is Exactly like a 3 cylinder engine...each face is a separate chamber and each performs all 4-cycles one at a time just like the Otto engine.
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  130. There are a lot of false urban myths and misinformation out there that is really disturbing... the Wankel engine is an outdated and obsolete engine that died-out because it simply cannot be adapted to utilize the modern technology that it needs to make it clean, efficient and powerful enough to compete with the vastly super reciprocating engine types mass produced in the millions today.
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  131. @Gewdvibes Please don't pretend to know anything about batteries son... they are heavy, dirty, expensive and horribly inefficient. Fusion will be great some day... IF it ever arrives but it still won't replace internal combustion in some applications. ICEs will be around long after gas and coal are gone... because they don't need fossil fuels.
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  132. Looks like without capitalism these people would have nothing...
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  133. Today marks the 7th anniversary of the end of RX production, on Thursday June 21, 2012 at 4:30pm the final RX-8 car ever to be produced rolled off the assembly line, the last RX model to ever be produced by Mazda.
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  134. Actually he saw a Megola rotary engine motorcycle and saw how the whole engine acted as a flywheel making the engine lighter and run smoother... of course we don't use Felix Wankel's design because it was too complex... Mazda bought Hanns Paschke's and Walter Froede's design which is not a rotary engine at all...
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  135. @renatinhoss NO, its not true... gasoline is the most common fuel type used in Wankel KKM engines and is best fuel type available.
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  136. Stand up for truth! Global warming is a lie!
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  137. +Natalie Wood ALL Wankel engines are 4-STROKE!
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  138. The problem was after the Tizzard Mission the US knew the brits were not ahead in the technology race... when the UK began to default on its 60 billion dollar war loan assistance to had to be cut off.
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  139. @Arne Maeschaelck Historically In years past a lot of homosexuals have endorsed the Mazda RX brand... but since it was discontinued in 2012 the LGBTQ community has adopted the the electric vehicle manufacturer TESLA Motors® as the official car of the gay community.
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  140. @jason pavlak Son, Wankel engines do not have blades. You don't sound very knowledgeable on this topic... in fact you just sound like a troll.
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  141. @Hieronymous Lex Its easy to spot angry little trolls like you son... Your hate filled comments, childish insults that are completely devoid of an intellectual argument...
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  142. Until you turn the key off, and the engine won't restart... that's when the fun stops and people realize why these engines are obsolete now.
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  143. The Wankel engine performs poorly in all applications which is exactly why it is now completely obsolete in the engine manufacturing industry.. the Wankel no longer offers any advantages and suffered from several serious disadvantages rendering it unable to compete against other vastly superior internal combustion designs like reciprocating and gas turbine engines.
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  144. +sporly born "light+high RPM" Complete and utter nonsense! The typical Wankel engine has a peak efficiency RPM range well above the ideal LOW RPM requirements of any efficient propeller design, and Gas Turbine engines offer an ORDER of MAGNITUDE greater power-to-weight performance, reliability and service life than any Wankel engine ever could... Wankel engines are not used in ANY production aircraft because they are very poorly suited to this type of application.
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  145. +Anonym The Wankel is very inefficient at converting the air and fuel mixture into heat, and it is even less efficient at converting the heat of combustion into mechanical work.. so basically more of the fuel and most of the heat gets wasted out the exhaust compared to a reciprocating engine... this can be easily seen in the exhaust gas temperature difference between Wankel engines and reciprocating engines and the amount of HCs (unburnt hydrocarbons) in the exhaust.
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  146. Hell no... this is probably the very worst choice for a first car... unless you like taking the bus when you go on dates.
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  147. Hey i just noticed that this guy ( ***ERNIE BRINK ROTARY***) has been promoting an infamous vaporware scam company called Freedom/Moller International that was sued by the SEC for fraud and filed bankruptcy after taking millions in investor's cash and never producing a single thing, A cursory look at his ramblings shows me he couldn't engineer his way out of a wet paper bag! LMAO.
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  148. Flat screen LED TVs have rendered the old curved tube types OBSOLETE... but EVs still remain a tiny niche market segment... less than 1% market share.
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  149. Rest in Peace 1964 -2012
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  150. @Alexei Rivera - Technoclast Why would Mazda bring back an obsolete engine technology that never made a profit and customers refuse to buy???
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  151. @MOVING COMBUSTION MAZDA Ernie Brink, WHY? Why Doesn't your engine run in your video???
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  152. Well, just off the top of my head... in 1992 you could buy a Corvette with more power, alot more torque for considerable less money... You'd be stupid to buy a Mazda that costs more than a Vette!
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  153. REST in PEACE Wankel engine... 1964 - 2012
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  154. The Wankel was first produced in Sachs motorcycles, the first car was the NSU. cheers!
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  155. +nabagaca Rechargeable batteries can never match the Specific Energy performance of liquid fuels... Capacitors have the same problem plus lower density.
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  156. +Apollo 99 Very true, the ICE powered car isn't going away... even if petroleum runs out because rechargeable batteries can't match the Specific Energy of liquid fuels... something these clowns still don't get.
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  157. Rotary fans be like, That's a WANKEL engine bitch... not a Rotary!
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  158. Audi has won Le Mans 9 times with a Diesel engine.
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  159. DoomsdayMelody91 Exactly... that describes one of the major flaws the Wankel KKM design had when it used to be found in automotive applications, the Wankel did not produce significant torque at lower rpm, where its needed the most.. it only made torque on the upper range... when you really need HP and not torque.. its the reason why the Wankel was always limited to lightweight and lightly loaded vehicles.. it simply could not generate sufficient torque for most car models.. a major contributing factor in the designs poor efficiency and why the design is no longer used today.
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  160. DoomsdayMelody91 Mazda lost a staggering sum of money on the RX-8 fiasco... nearly bankrupted the company completely..
    3
  161. @Deimos Phos The weak unreliable engine was the reason why this car was a failure.
    3
  162. POS
    3
  163. Makes a bloody good prop to hold up your bonnet
    3
  164. Adam Canada Consider yourself among the lucky... there is a good reason why Mazda stopped selling them..
    3
  165. Adam Canada unfortunately it is true.. Mazda is still to this day one of the least desirable Japanese cars..
    3
  166. When you make a video about an ENGINE FLAW you might find images of other planes that used THE SAME ENGINE the fact that you didn't realize this or that the Hurricane used the same Merlin engine with the same flawed carburetor isn't exactly a good sign that you wrote a well researched comment.
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  167. @Walter Yellow Its was a Hollywood teen blockbuster called 'Fast and Furious" While I don't understand it? I'm told the character Han Solo is a gay icon in Asia. I don't know where you live? But the RX-8 is popular only for engine swaps like LS, 2JZ and Barra.
    3
  168. +silver fox The ME-109 still shot down more aircraft than the spit, it was the most successful fighter aircraft design in history.
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  169. tyler white I'd be good to keep a spare handy too! 
    3
  170. @Jett Sioson The Wankel burns more fuel per horsepower generated because it is Less Efficient not because of it's displacement.
    3
  171. +Fenrir The Unchained The Schilling device reduced the flooding problem, but did nothing to solve the fuel starvation problem.. only the American Bendix carb solved both problems
    3
  172. chrischoy9 Motors don't just run on electricity son... they run on gasoline too! 
    3
  173. NEWS FLASH: The Rotary Is A Garbage Engine. https://jalopnik.com/the-rotary-engine-sucks-1773174001
    3
  174. There is nothing you can say to me that will change the Wankel engines numerous fatal flaws or bring it back from extinction in the automobile industry...
    3
  175. 231mac I don't think I've ever met a salesman that knew much about engines.. lol
    3
  176. +Chocolat Absolutely true... the RX-8 was a horrible design and a very expensive embarrassing fiasco for Mazda, it sold so poorly that they never recouped its design and developments costs. Mazda board voted in April 2009 to cease production and discontinue the RX brand altogether to save the company from bankruptcy... Mazda received a $3 billion USD government approved bailout package to stave-off bankruptcy. Mazda is still heavily in debt today.
    3
  177. Yeah it has two pistons..
    3
  178. Mazda discontinued the RX brand because they no longer sold... why would Mazda bring back something that was a huge failure?
    3
  179. Wankel engines were an evolutionary dead-end... an engine that has been completely obsolete in the engine manufacturing industry for years.
    3
  180. +Marty Miles Sorry Marty, the Packard V-1650 used a "float-less" or pressure-fed carburetor and was never fitted with fuel injection, Like the later Rolls-Royce Merlin 68, 69 models it used the Bendix-Stromberg PD-18 Updraft pressure feed Carburetor.
    3
  181. The energy density performance of Li-ion batteries is horrible. Do you realize that the best BEV range available is a Tesla S 100... and that its massive 1,440 lbs of Li-ion batteries only stores the same energy of 8 gallons of hydrocarbon fuel that weighs just 56 lbs!
    3
  182. Mazda is not a fan anymore either... sales of the RX brand had been steadily declining since 1986 and the last two RX models suffered disappointing sales putting the company into billions of dollars in debt.
    3
  183. Yes, its very inefficient among its many fatal flaws... the Wankel is obsolete now because overall it is inferior to the other types of engines still in mass production. The Wankel no longer offered any advantages in power, performance or size and weight. Its major disadvantages included poor power characteristics and torque output, poor reliability and short service life and terrible combustion and thermal efficiency and the resulting issues with poor fuel consumption and emissions.
    3
  184. +yjjeeper1 Licensed? BMW mechanic? Do you need proof you recieved a rabies shot and they give you ID tags for your collar???
    3
  185. Nitromethane fueled engines require a much richer AFR than other fuel types.
    3
  186. You are very welcome, I don't know where you live? Here in California you can buy hydrogen fuel cars by Toyota, Hyundai and Honda... but they are all Fuel Cell hybrids.
    3
  187. ...investment scam
    3
  188. Not any the are considered remotely practical, the best solution has already been employed.. replace the inefficient Wankel design with a superior reciprocating engine.
    3
  189. That would require a complex and expensive filtration and refining system that likely exceed the cost of the vehicle and need extensive maintenance. The Wankel is obsolete because it no longer offers any of the advantages you mentioned... in terms of power output the Wankel is now average at best, it is more expensive to build... there are reciprocating engines that offer comparable smoothness. Compactness and low weight are not really that important in automotive design and for aircraft? The Gas Turbine engine offers vastly superior smoothness, compactness and power-to-weight ratio not to mention better fuel efficiency and reliability.
    3
  190. +Taylor Latch Please don't confuse Wankel engines with Rotary type engine either by using improper terminology like brand names, "fan slang" terms and street patois... The Wankel engine KKM engine is not a Rotary engine and although there does exist a single rotary version, it currently resides in a museum in Germany.
    3
  191. I own two, 4-stroke reciprocating engines that use ports and have oil injection and one 4-stroke reciprocating engine that has no poppet valves at all, just ports and requires premix.
    3
  192. There are also 2-stoke engines that have poppet valves, wet sumps and no oil injection/pre-mix.
    3
  193. Most 2-strokes with poppet valves are Diesels and require Scavenging either by a blower or coupled turbocharger.
    3
  194. The RX-8s engine was the worst ever... why do you think Mazda recalled them???
    3
  195. Apex seals are extremely fragile and failure prone compared to piston rings, a round seal expands and contracts much more evenly compared to the irregular shape and right angles found in the Wankel. The apex seals are more exposed to high temperature and require a wider tolerance which leads to failure due to brisance and ablative damage.
    3
  196. The more you learn about them the less you want to own one...
    3
  197. @Jean-Yves Laliberté Indeed, the best advice is not to buy one of these very unreliable, obsolete engines in the first place.
    3
  198. @Axel bodat The "Most Successful" Japanese automaker at Le Mans is TOYOTA with 2 wins... both wins with a superior reciprocating engine.
    3
  199. +TheKiwisage Mazda is not underrated... its just one of the smallest and least successful Japanese automakers...
    3
  200. KKM stand for Kreiskolbenmotor or Orbiting Piston Motor
    3
  201. Wankel engines have terrible torque output because of the low BMEP and the low mechanical efficiency, the Mazda 13b for example only has a 30mm stroke from a 15mm crankshaft offset without the mechanical advantage that a reciprocating engine with a connecting rod does... the triangular piston (rotor) must push directly on the crankshaft throw without any leverage and actually works at a mechanical disadvantage wasting power and torque.
    3
  202. You biggest problem is getting it to start...
    3
  203. The FD was overpriced too... but it was better designed and built than the RX-8.
    3
  204. +ERNIE BRINK ROTARY The Wankel engine is an outdated and completely obsolete technology in the engine manufacturing industry, even Mazda abandoned development in 2009 and ceased production in 2012. Mazda has not released a new production Wankel engine in 23 years!
    3
  205. @Gewdvibes You must be smoking crack if you believe that solar and wind can replace internal combustion engines... because everything will come to a sudden halt every night the wind is not blowing! Lol!
    3
  206. @Gewdvibes No, I'm dead serious kid... there is no technology available that can completely replace internal combustion engines in the automobile industry... anyone that tells you otherwise is clearly not educated enough to speak intelligently on the topic.
    3
  207. The Wankel engine is dead... never coming back.
    3
  208. +Chad Vallance How does that help technical schools prepare students to repair vehicles on the road today?
    3
  209. +Chad Vallance The students in technical school today will most likely never even see a Wankel engine in there entire career as these cars are extremely rare and quickly becoming extinct. There were over 100 million new cars sold last year with reciprocating Otto, Aktins, Miller, and Diesel cycle engines, hybrid power-trains, hydrogen fuel cells, alternative fuel engines and battery electric systems (and soon HCCI engines and turbo-compound engines) and absolutely ZERO cars sold with a Wankel engine. Never before has there been so much diversity in automobile engine technology, Today more than ever before in history, teachers and students simply cannot waste time on obsolete technology that they will never encounter in the field when there is so much new technology in the industry that needs well trained qualified technicians to service them. cheers!
    3
  210. +Jon Shaffer Indeed, poor reliability has always plagued the Wankel engine, but it is low fuel efficiency that prevented it from being widely adopted or successful commercially in any applications, particularly aircraft and generators where brake specific fuel consumption is a critical design requirement.
    3
  211. Wankel engines are typically less reliable and generally have a much shorter service life than reciprocating engines, this is due to the many fundamental flaws found inherently in the Wankel KKM design... There is no effective means to prevent this from occurring which is why these engine have such a notoriously bad reputation and are no longer manufactured anywhere in the world.
    3
  212. Wankel engines are obsolete because they are inferior to other types of internal combustion engines that are still being mass produced. The Wankel no longer offered any significant advantages and had too many disadvantages; Poor reliability, short service life, low power density and poor torque characteristics. low efficiency and higher exhaust emissions. Mazda's last Wankel engine the Renesis had over 235 moving and seal related parts... Ironically its the tiny, fragile sealing components that people often overlook that are the primary source of the designs terrible reliablity problems.
    3
  213. Wankel engines are obsolete because they cannot achieve acceptable fuel efficiency.
    3
  214. This is a Wankel KKM engine, sold under license by Graupner GmbH. until it was discontinued several years ago.
    3
  215. That is why they are obsolete... horrible efficiency.
    3
  216. Tesla electric cars are the official car of the LGBTQ community. https://www.youtube.com/watch?v=eLSR_pa6vjk
    3
  217. Not true, NSU Motorenwerke GmbH. licensed the Wankel KKM engine design to 26 licensee's and dozens of their subsidiary companies. Fichtel & Sachs, Ingersoll-Rand, Lada, Norton, Yanmar, OMC, Graupner, Suzuki all produced and sold commercial versions under license. Although most of the Wankel-NSU licensee's shelved plans to sell Wankel engines before reaching production. Good point, the Wankel's overall performance is simply inferior to reciprocating engine technology.
    3
  218. The Wankel engine cannot generate sufficient static compression ratios to support reliable compression ignition and the weak, fragile sealing system cannot handle the higher pressures... many have tried to make a Diesel Wankel, all have failed in embarrassing fashion.
    3
  219. All Wankel engines use the same 4-Stroke operating principle... the Wankel's limited geometry envelope does not allow for a modern, efficient combustion chamber design... so incredibly poor, and incomplete combustion is inherent to the basic fundamental design.... it is also why the Wankel engine is now obsolete in the engine manufacturing industry.
    3
  220. @will w Yes, Mazda has already tried this approach with an exhaust afterburner device called a Thermal Reactor. Several early emissions controlled Mazda models were equipped with Thermal Reactors and functioned similar to a 2-way Reduction Catalyst reducing HCs and CO through Oxidation. The introduction of more effective and efficient Lambda fuel controls allowed the use of modern 3-way catalysts making the primitive afterburner devices obsolete.
    3
  221. Batteries are expensive, inefficient, have a relatively short service life and they are bad for the environment...
    3
  222. Indeed, the durability of seal that must deal with right angles was a fatal flaw in the Wankel design, a circular cylinder and piston seal are vastly superior. . It is a fascinating design to look at for sure unfortunately it never lived up to its promise of replacing reciprocating engines.
    3
  223. Anyone that believes electric cars have a future? Doesn't know anything about automobiles.
    3
  224. Electric motors are without any doubt the most efficient... however rechargeable batteries and transmission grid system are still horribly inefficient and completely incapable of supporting a mass conversion to EVs.
    3
  225. +josepla yer21 We were talking about real cars... not the video games.
    3
  226. The false hysteria of global warming is about power and money.
    3
  227. Mercedes-Benz unveiled their first HCCI engine 10 years ago... Mazda has built its entire business model around building disposable cars, its what they are famous for!
    3
  228. @Tim Schutte WRONG! He did not make this engine, it is a Graupner GmbH. model 49PI that was later sold by the O.S. brand and was discontinued many years ago.
    3
  229. YES, technically speaking, the Wankel KKM design is not a rotary engine at all, only the initial failed prototype (DKM-54) was a rotary. The now defunct registered trademark brand "Mazda Rotary®" which pays homage to Dr.Wankel's work has unfortunately become patois, street slang rather that the correct term 'Orbiting Piston Engine'.
    3
  230. Martin - Test- True, because Norway exports 22 billion dollars in petroleum every year... that is burned in some other country... Making Norway the biggest hypocrites in the world as well.
    3
  231. Australia is about as far from the center of the automotive universe as you can get without leaving the planet... Wankel engines are no longer able to compete with reciprocating engines in any applications, especially motorsports which is why Wankel engines are no longer used in any world class or major professional racing series... and no longer manufactured at all.
    3
  232. +Eric Christian Felix Wankel and Walter Froede developed the Wankel DKM-54 prototype engine from their 50cc NSU motorcycle supercharger design... which is of course why the orbiting piston concept still works better as a compressor than an actual engine.
    3
  233. +Travis Thacker What would the point be of compressing the hot expanding gases? How will you ignite the exhaust gases a second time if the air-fuel mixture is outside the range required for ignition and flame propagation to occur???? Why not just switch to using more efficient reciprocating engines like every manufacturer did, just like Mazda did in 2012...
    3
  234. @Error I see your understanding Otto type engine operating fundamentals is very limited and you are very confused about the fundamental differences between Homogeneous Charge Spark Ignition mode and Stratified Charge Compression Ignition mode operation... In Homogeneous Charge Mode operation the charge temperature must be maintained well below the auto-ignition temperature of the fuel to prevent unstable, erratic pre-ignition from occurring before the spark ignition and properly timed and controlled flame propagation. Pre-ignition wrecks efficiency, emissions and quickly destroys the engine. Efficient flame propagation speed and Deflageration of the air/fuel charge must remain in the subsonic velocity region... The geometry envelope of the Wankel KKM engine design that allows it to function as a 4-stroke engine also physically limits its Static Compression ratio and combustion efficiency decreases when the combustion recess volume is reduced. Don't confuse 4-stroke Diesel-Cycle with the 4-stroke Otto-Cycle operating principles... they differ greatly in several regards most notably how they react and respond to turbocharger and supercharger forced induction.
    3
  235. @Error It would seem there are many things you do not understand, How can you really care if you are unwilling to understand something as important as why the Wankel engine was a commercial failure? The Wankel engine design is inherently inferior to the reciprocating engine types in every significant respect... all the engineering in the world is not going to bring it or the RX-7 back...
    3
  236. Ernie Brink's engine has the worlds best fuel mileage... BECAUSE IT NEVER RUNS! LOL!!!
    3
  237. Technically it is not a rotary engine, it is a Wankel KKM engine ( a type of orbiting piston engine) manufactured by Graupner GmbH. Wankel engines are all obsolete today because the design of their combustion chamber does not allow complete or efficient combustion to occur.
    3
  238. You mean "WHEN" the engine breaks... which is unfortunately very often.
    3
  239. @Isaac Rodriguez You are very welcome sir... because it seems some of you were unaware (or in denial) that Mazda discontinued the RX brand.
    3
  240. +dang dang If there were any positives? They would still be mass produced.
    3
  241. Any country that bans guns, bans freedom.
    3
  242. You say that now but wait to you own one, Haha!! You can buy them here as little $250 USD now... but expect to pay for a new engine too. Nah, its not a real sports car... and its kinda cheap looking too.
    3
  243. Longer pistons(rotors) only increase the reciprocating weight and drastically reduces the rpm range and increases problems with sealing the apex seals...
    3
  244. Klöckner-Humboldt-Deutz (now Deutz AG.) was one of the early Wankel licensee's and developed the widest piston(rotors) configurations but never produced them. Ingersol-Rand another Wankel licensee developed and produced the largest diameter engines. But both configurations severely restricted rpms and caused additional stresses on the apex seals.
    3
  245. The 2.0 liter Skyactiv-X Mazda3 delivers 43.6 mpg on the new European WLTP drive cycle test. No EPA ratings yet but they could be near the 50 MPG mark.
    3
  246. Mazdas don't last 150,000 miles... what is your point.
    3
  247. RX-8 flooded and won't start... its been towed back to the Mazda dealer to get its 4th new engine...
    3
  248. The M.52 was cancelled before design work was completed and any significant construction work started, a simple visual comparision confirms the design are unrelated. The Bell X-1 was not based on any design or data produced in the UK, Bell Aircraft and the United States were years ahead of the Miles company and the UK.
    3
  249. The FAILURE of Liberalism!
    3
  250. The RX-8 looks like Jeremy's ass!
    3
  251. Obsolete, discontinued by Graupner GmbH. years ago.
    3
  252. @Alexei Rivera - Technoclast The Mazda Renesis engine passed the world's strictest emissions standards (The RX-8 met BOTH EPA Tier2 Bin5 AND California's ultra tough CARB ULEV II) right up until Mazda pulled the plug on production due to LACK OF SALES!
    3
  253. @Alexei Rivera - Technoclast Really??? Because the Renesis was the most powerful normally aspirated production Wankel engine Mazda ever made... so you look like a fool right now.
    3
  254. @Pikkon So you didn't know? That there is not a single Wankel engine design in the world that meets the reliability requirements to be certified by the FAA or the EASA??? You don't know much about Wankel engines do you... are you even old enough to drive yet kid?
    3
  255. @Pikkon "make sure it runs for 5 or 10 minutes before turning it off" You are certainly no expert kid, if your engine floods or is hard to start? The compression is LOW and the seals are DAMAGED, the engine needs to be overhauled or replaced..
    3
  256. @Pikkon Mazda does not recommend pouring oil in you gas tank and does not recommend using 2-stroke oil? DO YOU KNOW WHY??? Mazda recommends using 4-stroke oil with an API service rating of SL or EC GF-3 What 2-stroke oil meets this rating???
    3
  257. @Pikkon You must not be very familiar with the NHTSA recall investigation of premature Mazda RX engines failures... The government investigation found that owners that provided fully documented service and inspection records from Mazda dealers and authorized service centers SUFFERED THE SAME FAILURE RATES! False urban myth BUSTED!
    3
  258. @SkrtSkrttt The 13B MSP-RE (Renesis) was the highest static compression ratio Wankel KKM engine design to ever see automobile production and the highest IMEP and BMEP of any normally aspirated production engine too... Raising the Static CR requires reducing the volume of the combustion recess (there is no other way to adjust the CR in the Wankel engine) thus reducing flame propagation efficiency. Higher IMEPs combined with the AFR stoichiometry needed for fuel efficiency and emissions is a perfect recipe for the high pressures, erratic combustion events and pre-ignition related brisance that destroys apex and side seals.
    3
  259. @SkrtSkrttt Wankel engines are obsolete because they are significantly less reliable, less powerful and less efficient than reciprocating engines... it was a commercial failure in every single application that uses internal combustion engines including those where there are absolutely no emissions restrictions. Only an imbecile would blindly regurgitate false rumors and urban myths without bothering to find out what he was saying was even true...
    3
  260. @Brandon Callahan I'm certain that its not the slightest bit random...
    3
  261. Bunker Fuel Oil No.#6 (Bunker 'C') must be preheated to over 100°F and is a very dirty, unrefined crude oil "cut" it is very abrasive and causes extremely high wear rates on some engine components and requires high compression to ignite reliably. New international laws are expected to bring a ban on the use bunker oil next year due to the excessive exhaust pollution produced by this very dirty fuel. Wankel engines must operate at higher rpm because they are much less mechanically efficient and produce less torque per pound of fuel. Wankel engines have only been briefly successful in very, small low priced sportscars and RC models. due to this very serious efficiency problem.
    3
  262. True, even Mazda finally ditched these troublesome engines and only make reciprocating engines now.
    3
  263. +kbmiller302ify What's you beef with Jason?
    3
  264. Not by much...
    3
  265. Not really, its actually fugly compared to the 2000GT
    3
  266. @DarceyDeeAtSea Really? Because the truth reads the same in any language, text or font....
    3
  267. @DarcyDeeAtSea Really? you could have fooled me, you seem to be suffering from a classic case of ozzy/kiwi "Tall Poppy Syndrome" that plagues that region.
    3
  268. Well, I guess we can now add your name to the long list of commercial failures with the Wankel engine....
    3
  269. @xke xke How come you didn't buy one Ernie Brink???
    3
  270. Overpriced and unreliable... its no wonder why Mazda sold so few of them.
    3
  271. Can you imagine? At one time people actually believed they would replace reciprocating engines...
    3
  272. The company that invented the Wankel KKM engine was NSU Motorenwerkes GmbH. it was at the time the largest motorcycle builder in Europe... Felix Wankel was a motorcycle fan and rider... he worked at NSUs motorcycle division. Félix Théodore Millet invented the Rotary powered motorcycle in 1892... Felix Wankels favorite bike was a legendary German racing bike company called MEGOLA Wankel copied the Rotary layout for his 50cc NSU supercharger and later his Wankel DKM prototype (a rotary motorcycle engine).
    3
  273. I salute Mazda for stubbornly remaining the smallest, least successful Japanese automaker...
    3
  274. Actually Mercedes-Benz unveiled their HCCI engine in a car 10 years ago and Volkswagen and Opel have also been working on the concept for years... the Mazda system relies heavily on HCCI component technology developed by Bosch from these earlier programs... only Mazda is taken the risk of launching an "half step" or intermediate stage version of this technology instead of a true HCCI system... they have chosen to be the Guinea pig.
    3
  275. @J Clark And engines like the Wankel that had inherently fundamental flaws become obsolete in the manufacturing industry regardless of how people take care of them.
    3
  276. Indeed, which is why these engine didn't sell well and were discontinued, RC models still prefer reciprocating engines.*
    3
  277. @Vladimir Lucifer The injectors job is to evaporate the fuel... and evaporation causes COOLING by the absorption of latent heat.
    3
  278. Every generation has some idiot like Elon Musk that thinks electric cars are the future!
    3
  279. @ziiofswe Actually, all Wankel engines use the same 4-stroke operating principle as the Otto engine... They sound like 2-stroke engines because they have ported induction and exhaust and open the exhaust port at a higher cylinder pressure than typical 4-stroke engines.
    3
  280. Yes, short service life and poor reliability are common in all Wankel engines and a major factor in the design becoming obsolete in the engine manufacturing industry.
    3
  281. Wow, someone flunked out of economics 101....
    3
  282. +Shadi Wajed Good comment, why should Tesla be exempt from consumer protection laws and not comply with the same standards as its competitors?
    3
  283. +JoshDoesEverything In hindsight we can see why GM pulled "the plug" on the EV1, it would have been a colossal commercial failure. Consumer Protection Laws prevent Tesla from selling direct to the public in some states... the argument is why should Tesla be allowed to sell its cars without the same support network the other manufacturers must provide to comply with the law.
    3
  284. Very true, Mazda discontinued the Wankel engine in 2012 due to poor sales, the company lost an estimated 3 billion dollar on the RX-8 fiasco.
    3
  285. Mazda was one of several companies that failed to meet the new interpretation of the existing Diesel emissions standards. Mazda Diesels were emitted 6 times the amount allowed and was unable to sell Diesel engines here because of these changes in EPA policy.
    3
  286. Wankel engines are mechanically LESS efficient... which is also why the consume so much more fuel.
    3
  287. +ConsLife - F Rolls-Royce never got the 2-R6 to start or run reliably.... the company went bankrupt trying to fix the problems.
    3
  288. The Wankel cannot support static compression ratios high enough to allow reliable compression ignition, no successful example has ever been produced.
    3
  289. +advanced muffin Actually no, there are no successful examples of a Diesel Cycle Wankel engine... the do not exist outside of a few failed prototypes.
    3
  290. +Romeo Barrozo Jr. A recent MIT study shows that the trend in increasing ICE efficiency is the future.. more practical and economical than plug-in EVs.
    3
  291. +Mazda rx7 TRUE, the Tesla has to also drag around 1,450 lbs of batteries... even when then are almost completely discharged! 3/4 TON OF DEAD WEIGHT!!!
    3
  292. +badboy 25 Why do these ass clowns think ICEs are obsolete???? Must a lot of ignorance about cars and the automotive industry you think?
    3
  293. +Paul Ciorogar 1955: "Nuclear powered vacuum cleaners will probably be a reality within 10 years." — Alex Lewyt, President of the Lewyt Vacuum Cleaner Company.
    3
  294. +sam guapo Not at all, you are coming across very clear as a complete and total fake.. a complete fraud.
    3
  295. +sam guapo You are a JOKE, A FAKE and a LIAR... a TRUE CRACKPOT!
    3
  296. +sam guapo Not at all... when you actually understand the engineering concepts and technology as well as I do? IT'S EASY TO POINT OUT FAKES LIKE YOU!
    3
  297. The Wankel is actually obsolete because of poor reliability and low efficiency problems that cannot be improved.
    3
  298. All of the major engine manufactures abandoned the Wankel because they were found to have very little useful development potential.
    3
  299. It is why these engines have been obsolete for years...
    3
  300. No longer made... obsolete technology.
    3
  301. +Andy Harman Absolutely, the current generation HEMI® engine uses a "quench" design theory which is a complete departure from and diametrically opposed to the Hemispherical design concept. Yes, its not the first time Chrysler put the HEMI® brand name on an engine that did not have a hemispherical chamber either.. the 215/245/265 cu.in. HEMI-6 engine was more of a "Wedge" chamber design than anything resembling or functioning as a hemispherical design.
    2
  302. Han Li Mazda doesn't make Wankel engines anymore... the RX VISION is a CONCEPT car...  not a real car that's going to be made... 
    2
  303. badass Engineering The problem of apex seal failure has never been solved... in 2009 Mazda cancelled all further Wankel engine development and production finally ceased in June 2012
    2
  304. James Rothwell Yup, that works out to a rather pathetic 81 Nm/ltr.. not very impressive at all.. 
    2
  305. Joseph Carprpenter No, they did not.. they unveiled the RX-Vision as a "CONCEPT" car and have never said that the design actually exists or has been approved for production.. Mazda's CEO has stated officially that Mazda will no longer manufacture cars with Wankel engines.
    2
  306. DoomsdayMelody91 Mazda lost a staggering sum of cash for 4 straight years starting in 2008 with a loss of $350 million USD and ending in 2012 with a loss of 1.5 Billion USD The RX-8 in particular fell well short of expectation with an estimated financial loss of 700 million dollars in development and production costs, post sale liabilities (recalls and warranty claims) and legals expenses.. It was one of the least profitable models in the companies history..
    2
  307. DoomsdayMelody91 The "Rotary" was only ever used in one street legal car model.. the Adams-Farwell.. I think you meant to say WANKEL?
    2
  308. +Dunn I'm sorry but that false urban myth won't fly here son... the NHTSA recall investigation put that old, tired-out, lame excuse to rest several years ago... the investigation board found NO LINK between owner abuse or neglect and the high premature failure rates... Mazda did not challenge these findings and voluntarily recalled engines and reimbursed owners for repair costs. Even Mazda's CEO said the Wankel engine could not return to production unless it could be made more reliable (Mazda's board cancelled all development of production Wankel engines in May 2009).
    2
  309. @riptide "80k???" They start to lose power and compression at 40k miles!!!
    2
  310. Tomorrow, June 21st marks the 5 year anniversary of the final demise of the Wankel engine... Mazda ceased production of all RX models half a decade ago
    2
  311. Most people that claim they have predicted the future, are also usually completely wrong...
    2
  312. Shikamoo P.K. Lol... you are no engineer my friend. Please stop pretending.  
    2
  313. Shikamoo P.K. Then what is the doktors favorite Rotary engine? 
    2
  314. +John y They didn't seem to live long anywhere.. that's why the brand is gone now.
    2
  315. +mischiefpwns The the FD and the RX-8 sold poorly in many countries because of that...
    2
  316. +JPUK5bbd The reliability problems are not related to how you drive or maintain them... the NHTSA recall investigation found no link between owner abuse or neglect and the unusually high number of RX engine failures. Mazda did not challenge these findings and voluntarily offered a settlement to buyers.
    2
  317. +Christian Javier RX-8s with automatic transmissions are among the least reliable, the worst fuel mileage and the least desirable. Best advice is to run away form this nightmare of a car.
    2
  318. @TheMatt999 Herr Doktor Felix Heinrich Wankel received an honorary degree from Ludwig-Maximilians-Technische Universität München... I think the guy who can't spell Doktor correctly in German is confusing a Rotary engine with a Radial because he doesn't know anything about engineering...
    2
  319. +Nicolas Broszky Agreed, Mazda would have been wise to end on a high note with the FD which is still held with some regard... the RX-8 on the other hand was indeed an embarrassing failure that nearly bankrupted the company for the final time.
    2
  320. +Aaron Campbell You have never seen a demonstration using an analogy where something similar is used solely for the purpose of demonstrating the effect? The Hurricane had the exact same flaw.. because it used the same engine...
    2
  321. 7 years ago this week marks the official end of commercial development of the Wankel engine at Mazda.. in a board meeting exactly one month earlier Mazda's board of directors voted to end development of its signature RX line of Wankel KKM engines for good.. and pulling the plug on its latest development the 16X program in order to concentrate the companies focus on its more successful line of Skyactiv-G® reciprocating Otto type engines it continues to sell to this day. The Wankel engine is no longer manufactured commercially for automobiles.. which was the only application the design ever saw continuous production.
    2
  322. +bubblemanpie Me too.. my favorite Rotary was the 9 cylinder Oberursel UR.II.
    2
  323. @Just A P39N I think you know nothing about cars...
    2
  324. David Edbrooke The Allison powered the fastest fighter aircraft in the world at the time it was introduced.. The Packard V-1650 was vastly improved over its original R-R design and included several American improvements that were later adopted by Rolls-Royce including the Allison's superior Bendix-Stomberg PD-18 pressure-feed carburetor which cured the Merlin's fatal flaw.
    2
  325. Well, Mazda had serious problems getting customers to buy them.. sales figures for the RX-8 took a sharp nose dive after 2004 and never recovered.
    2
  326. +Andrew Fishburn Rolls-Royce did not develop the fuel systems on any of the Merlin engines.. Early Merlins used automotive type SU carbs or later American produced Stromberg-Bendix carbs.. The only pressure-feed system produced by Rolls-Royce was a copy of the Bendix first used on the Griffon 101 introduced in 1946. Ignorance is bliss... isn't it?
    2
  327. +Andrew Fishburn Now you are suggesting Rudolf Diesel didn't invent the first practical Direct Fuel Injection System. Please Just tell us who did?
    2
  328. +otterspocket2 Then cite an example of a Rolls-Royce or any other fighter aircraft engine equipped with fuel injection? Its a simple question, if the brits possessed this technology there should some example of it to show for it.
    2
  329. +silver fox R-R had a practical production quality GDI system? Please cite an example? Then explain why R-R adopted the American Bendix-Stomberg PD carburetor? A pressure-feed carb is still a long way from an actual fuel injection system.. something that Rolls -Royce never had available for the Merlin during the war. Any single engine pilot would consider a complete loss of power a "fatal flaw" although a complete loss of power is not always fatal.. its without in doubt the worse type of mechanical failure short of structural failure, Loss of power is, in any normally heavier than air vehicle, effectively a loss of flight control.
    2
  330. US designed and made carbs were fitted to brit made Merlins, and US made Packard V-1550 shipped to the UK.
    2
  331. +Chris Norman Yes, GDI effectively lowers the octane requirement, or allows high manifold pressures without the risk of detonation. It also completely eliminates the the fatal stalling/flooding problem in addition it gives the engine more power and greater range by effectively reducing pumping loss internally ( no restrictive, power robbing venturi in the intake path) and as a additional bonus effectively reduces icing, prolongs engine life and the problems the Allies had with lead fouling. Then why did the US Army Air Force also develop and introduce its own GDI system too?
    2
  332. +John Burns wrote, qoute; "as they developed only the FW-190 after it." LOL!!!!!!
    2
  333. +101jir In the context of video's subject matter, the severely flawed fuel system of Rolls-Royce Merlin's SU flaot valve carburators there should be no confusion regarding the meaning of the term "stall"
    2
  334. +Maunster! Do you pronounce engine, _ enGINE_ Of course not, go get yourself an education you troglodyte!
    2
  335. tyler white First of all its a Wankel engine... not a Rotary. If you can't get the basics straight youre off to a very bad start.Ignorance is bliss as they say....Absolutely and completely false, you really need to do some unbiased research and serious study on this now obsolete design and this engine model in particular... it in fact has a terrible reputation for reliablity. There are much bigger problems than oil metering.. The Renesis has been plagued by a varity of very typical premature engine failures that are common to all Wankel type engines and is not unique... what is unique is the Renesis engines propensity for premature failure.No one has ever solved these issues, not even Mazda... whos final "fix" was to simply end all production of Wankel engines back in June of 2012...As i said before, good luck... you will need every bit of luck you can get!
    2
  336. tyler white absolutely not...youre very confused and misinformed here..  the KKM is NOT a Rotary in any technical classification... Well if you did any  research it was not very good... Wrong, the DKM-54 ptototype is directly related to Felix Millet's design...but the KKM completely abandons the concept for a very conventional "non-rotary " layout... It is an obsolete design because its no longer in series or mass production anywhere in the world... its dead. In addition to the obvious fuel consumption and emissions problems,  Mazda's had serious problems with low torque and getting longivity and service life up to modern automobile standards... ""unlike a traditional piston engine whos crank is submerged in the oil"" WTF????  Are  you serious??? they how do explain "dry sump" Otto engines? They also have much better reliability and longer service life than Wankels. Alot of old myths... but no research that confirms those popular misconceptions... Wankels engine are obsolete because they simply were not good enough to compete with Otto and Diesel engines... They are on their way to becoming extinct like steam owered cars and dinosaurs. No, the Wankel KKM is NOT a Rotary... get you facts straight.
    2
  337. tyler white The Wankel KKM uses a conventional layout.. with a fixed engine case and a rotating main crankshaft... This represents a design that completely discards the Millet concept  of a rotary layout... which is identified easily by its fixed non-rotating mainshaft or axle... and rotary engine mass. You are proceeding with several misconceptions that stem from a general lack of knowledge and history of the design, basic understanding of engineering concepts as well as some very poor translations of the technical nomenclature.  lets not get confused by using advertising mumbo jumbo... even if it has started to become vernacular among certain groups such as the Mazda aficionados, such terms are slang... not engineering  lexicon, especial considering that the Mazda brand product is now defunct.
    2
  338. ***** No, that's not true... even though later engines were detuned and produced significantly less power than the early engines... they still had serious premature failure issues and many failed at around around 60k miles... the majority of them have had a replacement under warranty... which was federally mandated to be extended to 100,000 mile after the recall investigation... the NHTSA found that Mazda had deliberately tried to cover-up the problem and didn't offer a reasonable warranty on the RX-8's. I know a lot of people driving theirs around with compression well below the specified mininum... that is one of the deceiving things about these engines... they can sometimes still run long after the the seal have become damaged and the power output is less than half that of new specs... Its surprising how many owners will say "it still runs great".... (as long as you don't shut it off and then try to restart it right away)... Lol
    2
  339. ***** Lol!  The U.S. Federal Government could not get Mazda to release such highly embarrassing figures.. The NHTSA had to threaten to sue Mazda to make good after its investigation proved that the Renesis engines did not meet basic industry standards for reliability and service life...and suffered an average 50% failure rate, it also determined that the failures were not due to neglect or abuse as Mazda claimed. Mazda agreed to recall only the early defective engines , a "fix"" was already issued on later ones (by detuning the power output and recalibrating the oil system) and agreeing to extend the warranty on all RX-8s up to 100,000 miles like most companies already do. The fix has resulted in a sharp increase in emissions failure which Mazda is already responsible for under existing federal laws.  Utter nonsense, its a problem completely unrelated to maintenance... the NHTSA has already proved this to be the case.  It is in fact, clearly a case of sub-standard design, which is why Mazda had no choice but to cease all production of Wankel engines on June 22nd, 2012. Mazda's Wankel engine assembly facility at its Ujina #2 plant was demolished to make way for its new engine plant that now produces its much more reliable and successful Skyactiv line of Otto and Diesel engines. Cheers!
    2
  340. +c0zened Yeah.. I bet you feel pretty stupid right now...
    2
  341. c0zened You don't know how stupid you look right now..? and that is the truly sad part...
    2
  342. Seramics The truth can not be suppressed or ignored... The truth shall prevail over ignorance and misinformation.
    2
  343. Nice sales pitch... but unfortunately if most of what you have said was true? They would still be selling RXs.. The fact is this car was a huge financial failure for Mazda with disappointing sales and numerous costly problems that plagued its production.. including the largest defective core engine recall in NHTSA history, numerous lawsuits for product liability and massive warranty payouts to consumers.. Mazda had no choice but to axe the RX-8 and the Wankel engine in April 2009 to save the company from closure.. all Wankel engine production ended on June 22nd, 2012 and the factory demolished to make way for its new Skyactiv-G® assembly plant that has slowly begun to pull the company out of debt
    2
  344. @Jett Sioson All Wankel KKM engines use the exact same 4-STROKE operating principle as the Otto engine... but it takes 1080° to complete it firing order sequence making it a 3.9 liter in total displacement.
    2
  345. +N4Zz Z No, each chamber recess goes through 4 separate cycles with only one cycle producing an expansion or "power stroke"
    2
  346. +KillaRock404 True, you don't need to replace it... you can continue driving a damaged engine for years until it gets to the point when it floods out every time you restart... otherwise 60k is about the average service life of a Renesis engine...before the compression drops to the limit.
    2
  347. Tedrick Leong There still seems to be a lot of confusion and misinformation here on this topic... the Wankel KKM design has been plagued with low reliability and short service life throughout its production history.  Even when operated and maintained following the manufacturers recommendations... these engines still fail prematurely with alarming regularity.. Statistically there will always be a segment of the consumers that either neglect or abuse there automobiles...  This statistical percentage does not reflect the much higher than average failure rate seen in the Wankel design..
    2
  348. Kinda ugly lookin too...
    2
  349. Sage Five The relative failure of the RX8 is not a matter of opinion... its a matter of fact.   
    2
  350. Chad Bremer You need to lie better... youre not very convincing really  
    2
  351. Luis 24 Youre just living on borrowed time... having trouble with starting?  
    2
  352. Dave warren Had a leak down test lately???.     I bet if we put it on a dynomometer it wouldn't run that strong 
    2
  353. "shooting the messenger" is an illogical, ad hominem attack... You appear too be someone very immature and unaccustomed to hearing or accepting the truth.
    2
  354. "brilliant engine"??? They certainly are... I have seen 2 Renesis engines overheat and catch fire... the flames are very intense indeed.
    2
  355. @Just A P39N Yeah, troll boy like you kid....
    2
  356. Entelin At least German pilots didn't have to worry about their engines stalling in a dive.. or carburetor icing, their engines used GDI
    2
  357. ***** Toyota, like Honda/Acura do not use the obsolete Wankel engine design either.. Toyota abandoned it's plans to produce a Wankel engine automobile in the 1960's Honda never bought an NSU-Wankel licensee agreement and has never developed a Wankel engine.
    2
  358. MElekiaZ No official confirmation, just more rumors
    2
  359. MElekiaZ You mean like the last two times the blog sites started a RX-9 hoax..
    2
  360. Evan Shaw Lmao 3 responses. You really do have too much time on your hands. Also 3 responses, u mad bro?
    2
  361. +Jaime Hernandez Unfortunately the Wankel engine had a lot of other serious disadvantages besides apex seal failures..
    2
  362. The RX-8 was without any doubt the worst RX model ever produced... Mazda would have been wise to end the faltering brand on a high note with the RX-7 FD.
    2
  363. +DemonSlayer879 So basically what you are saying is that everyone that bought an RX-8 is stupid and too incompetent to own a car? I think I agree with you on this theory... anyone stupid enough to buy a new car with a Wankel engine knows nothing about automobiles.
    2
  364. From cold start? What about warm start??? that is when you really see issues related to damaged apex and side seals...
    2
  365. Goofer McDoofer Yeah.. these Idiots don't even know the difference between a Wankel and a Rotary! 
    2
  366. Dustyice exactly my point... you have already made a fool of yourself.
    2
  367. Lai Yuin Hong Thanks for the reply. No, unfortunately there is still a lot of ignorance on this topic. No, Dr. Hanns Paschke invented the Wankel KKM in 1957 while working for the Wankel-NSU company. Mazda purchased the rights to use the KKM-57 in 1964 Felix Millet invented the Rotary engine in 1892. Dr.Felix Wankel invented the Orbiting Piston Engine in 1954, it was a Millet type Rotary in basic layout but incorporating his orbiting piston concept. This engine never developed beyond the concept prototype. Dr. Paschke's KKM-57 is not a Rotary type engine, it uses a conventional layout with a rotative main crankshaft and a fixed rigidly mounted engine case or housing. I hope this clears up your confusion. best regards, Cheers!  
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  368. +Dustyice Surprised how bad they really were? Well its no surprise really, even Mazda discontinued them over half a decade ago now... A very good example of "How Not To Design An Engine"
    2
  369. I think your story is true, except perhaps inaccurate on a few details... yes, the Packard version was considered far more reliable and smoother running.. but as Wilbur pointed out, very few brit fighters were fitted with them.. most Packard Merlins exported to the UK found their way on to bomber aircraft. By far the most desirable Rolls-Royce produced Merlin engine were those equipped with the Packards' Stomberg pressure feed carburetors that were originally developed by Packard to solve a major flaw in the design of the Merlins fuel delivery system which used obsolete float bowl SU type carburetors.. a flaw that could cause the engine stall in a dive    So absolutely, any RAF pilot would prefer the Packard type fuel system over the Rolls system without a doubt!
    2
  370. Wilbur Finnigan Production standards on the Packard produced engines is well known to be superior to the Rolls-Royce engines which ranged widely in quality control to an alarming degree..
    2
  371. The Wankel KKM has a triangular shaped piston, the name PISTON is right in the engine's name.
    2
  372. A rotor only moves concentrically on a fixed axis... the Wankel's triangular pistons orbit in a distinctive planetary motion as it reciprocates every crankshaft revolution.
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  373. @deathmonkey36 Felix Wankel's design (the DKM-54) DOES NOT have an eccentric-crankshaft... his design had a fixed, non-rotating AXLE and the entire engine housing assembly rotated around this fixed axle.
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  374. Phu Doan No, you're the moron, if you bother to actually look at one? You can clearly see the two flat quench zones in the chamber and the flat topped piston . Its a type of Pent-roof chamber... no one uses hemispherical chambers anymore... they are OBSOLETE
    2
  375. Without a doubt the worst RX model ever made..
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  376. +Mr S agreed
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  377. Flooding and hard starting in a common problem in all Wankel engines and is a typical symptom of damaged seals and low compression... if you RX-8 floods? You need a new engine.
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  378. Kirothe Avenger Ah.. No, Rolls-Royce adopted the Packard's Bendix carburetor.. which is not fuel injection at all.. just a much better design than the R-R's antiquated SU float bowl carbs. The Luftwaffe used GDI (Gasoline Direct Injection) throughout the war while the technology was not available to the Allies until nearly the end of the war on just a few selected models, mostly American manufactured.
    2
  379. +Sultros Drunknsage The US did not steal the Merlin.. in fact the brits came to the US for help, due to the simple fact that Rolls-Royce did not the capacity to meet demand and did not have the experience to convert the design into one suitable for mass production. R-R continued building Merlin engine mostly by hand-built methods and techniques throughout the war. Ford Motor Company, who was the first choice by both American and british officials actually turned down by the offer and proposed its own design ( The Ford GA V-12) Packard was later offered the deal and accepted. Packard quickly assessed that the problematic SU carb was obsolete and redesigned the Merlin to use the superior Bendix pressure feed design. American made Merlins delivered to RAF featured the Bendix carb and testing revealed the superior performance, R-R later adopted the American improvements.
    2
  380. +Bruce Bartup The SU equipped R-R Merlin certainly was flawed.. and completely outdated. The Chandler-Groves pressure feed carburator was in production in 1937. And the Bendix-Stomberg was in production by 1938. German Aircraft manufacturers were producing engines with 3 different types of Direct Fuel Injection as early as 1935. All Carburaters have one major disadvantage compared to fuel injection... LESS POWER Carbs require the use of a venturi to produce a pressure drop... this pressure drop is the direct result of the restriction in air flow caused by the venturi.
    2
  381. 3/4 of a TON of weight to drag around... whether fully charged or completely dead... Motors are not the fatal flaw in EVs... ITS THE BATTERIES!!!!
    2
  382. Toyota Prius engine is 41% and some Diesel cars are over 45%... next generation of internal combustion engine will be reaching even exceeding 50%
    2
  383. You're not saying anything that wasn't said 100 years ago or even 20 years ago... and yet EVs remain a tiny, stagnate, niche market segment that still only accounts for less than 1% of cars on the road.
    2
  384. Do you have a vested interest in Tesla? Are you paid to endorse Tesla Motors? Are you aware that Tesla Motors is currently under investigation by the U.S. Securities and Exchange Commission for stock fraud and stock price manipulation???
    2
  385. True, although most of its electric-only competitors have failed, gone bankrupt or turned out to be vaporware scams, Tesla remains the only major manufacture committed to only electric cars... The remaining major automotive manufacturers will only be complying with laws that mandate EVs and do not allow free market trade or consumer choice... most of these "mandate vehicles" will continue to require massive tax payer subsidies and sell at a net loss to the manufacturers due to the higher costs and low volume.
    2
  386. Tesla looks to be on a path of self-destruction already... the company cannot operate at a profit and its lack of powertrain options is a serious liability to its chances of a long term sustainable business plan.
    2
  387. I'm not getting half billion dollar loans from the taxpayers or taking a $2.6 billion dollar bonus from my investors, Elon Musk has earned Billions from Tesla even though the company has never made a profit! and now he is asking for another $55 BILLION dollar payout!!!
    2
  388. Chevy Bolt sales have been a major flop and GM loses $9,000 on every one sold despite the up $10,000 dollars in subsidies per car... The Tesla Model 3 has yet to deliver and currently Tesla is under federal investigation over the companies misrepresentation of the Model 3 performance claims and availability... whistle blowers at Tesla claim the the car is riddled with major design defects.
    2
  389. +gilessmokey Clearly we are dealing with a fully indoctrinated Enviro-cultist that knows nothing about automobiles accept what crooked salesmen like Elon Musk have said... It is extremely difficult to talk rationally or logically with these people as they already have a false impression of how the world works and refuse to open their eyes to see the truth.
    2
  390. Your view of the future is pure fantasy... based on ignorance and false beliefs.
    2
  391. Tesla is the only electric only company left... the rest have gone bankrupt or turned out to be investment scams.... I won't be surprised if Tesla implodes within the next year... 11 billion dollars worth of its stock is currently "Short sold" by investor betting the company will fail in the near future.
    2
  392. +Stef G No, not all... just someone willing to tell the truth... someone more knowledgeable and experienced in engineering and the transportation industry.... you must be a person not accustomed to dealing with these topics or being told the truth about why EV failed to replace ICE cars and will always remain a tiny niche market product.
    2
  393. The 109 remains the most successful combat fighter ever built.
    2
  394. Electric vehicles have been manufactured for over 100 years...
    2
  395. No 4-stroke... all Wankel engines are 4-stroke.
    2
  396. Bullshit, the Mazda parts index shows over 235 moving and seal related parts for each Renesis engine... Ironically its these very same tiny, fragile seal parts that fans tend to ignore that are the primary source of premature engine failures that are so very common in this now discontinued engine... The Wankel was such a troublesome and poorly performing design that Mazda now only sells reciprocating Otto and Diesel engines and discontinued the RX brand nearly 7 years ago.
    2
  397. Stand up against tyranny! The rich are stealing from the poor using a fear of "Global Warming" as the weapon!
    2
  398. Its FUGLY and horribly unreliable.
    2
  399. +Joshua Olson Yeah, you're a fucking idiot dude... don't have the slightest clue what you are talking about kid.
    2
  400. +Joshua Olson Thanks, but that means very little coming from a brain dead "rotard' like you... the RX-8 continued to meet the strictest emission standards in the world (Califorinia's CARB regulations) right up until sales of the RX-x dried up completely in 2012.... Mazda simply ran out of stupid people dumb enough to buy these gutless, unreliable POS cars.
    2
  401. Well, it is a gay car...
    2
  402. +vjjeeper1 You clearly know very little about Wankel engines son... a Mazda 13B has a true displacement of 3.9 liters.
    2
  403. +yjjeeper1 Its very simple... each orbiting piston(rotor) has 3 sides forming 3 combustion chamber volumes, each with a swept volume of 654cc. times the 2 housings is 6 and equaling 3,924cc. The other important thing that people without formal engineering experience fail to understand is that a 4 cycle Otto or Diesel engine completes its firing sequence in 720° of crankshaft rotation while the 4-cycle Wankel KKM designs required 1080° of rotation to complete its firing sequence... These two important and often misunderstood details are the basis of the commonly used "2X" conversion formula for accurately "comparing" the displacement of the Wankel with other designs.. Any questions? I would be happy to explain in more detail...
    2
  404. +yjjeeper1 I don't think you could identify a Rotary type engine if I dropped one on your foot son.
    2
  405. Wankel engine have an inherent weak and inefficient sealing system, they also all have a very poor, inefficient combustion chamber design that leaves a lot of unburnt fuel.
    2
  406. Internal combustion engines are not going anywhere... they are here to stay because there is no available technology to replace them.
    2
  407. Insert jealous homosexual rotard comments below.
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  408. One thing is for certain, the Wankel engine is dead... and it is never coming back.
    2
  409. I too immediately thought of Mazda's failed foray into producing cars with the Miller Cycle engine... Its too bad Mazda is better at losing money than making it.
    2
  410. And the RX-7 looks like something a Pontiac Trans Am shitted out...
    2
  411. @Charles Hplmes MX-5s are still made... Mazda has not made Wankel engines in almost a decade....
    2
  412. @Rui Cameria Sales of the Mazda RX series fell into steep decline since 1986... people do not want to buy a new car with an unreliable engine with no torque and shitty fuel economy.
    2
  413. Electric cars are still a bit of a joke...
    2
  414. Gas turbines outperform all other types in aircraft, stationary and high speed marine applications... but unfortunately they have some very restrictive operational and economic limitations which are a particularly difficult to deal with in an automotive or land based vehicle applications.
    2
  415. Every Wankel engine has a piston with 3-sides.. the difference between an Otto engine and a Wankel engine is the Otto engine completes its 4-stroke firing order in just 720° of crankshaft rotation while the Wankel requires 1080° to complete its sequence.
    2
  416. Ignore these stupid trolls... they wouldn't know a good car if one was dropped on their head!!!
    2
  417. You won't find any automobile engine produced in the 21st century as horribly inefficient as the Wankel... which is also why it was generally a commercial failure and is obsolete now.
    2
  418. @Glen Turney All Wankel KKM type engines use the exact same 4-stroke operating principle as reciprocating Otto engines... there is no such thing as a 3-stroke... that would imply that one of the 4 critical phases was absent... which is simply not the case.
    2
  419. @Glen Trurney Mercedes-Benz developed and tested direct fuel injection on Wankel engines in the late 1960's... If I'm not mistaken? All Mazda RX models were equipped with Port Fuel Injection in the mid-1980s and from then on. Run on Diesel? Certainly not with HCSI mode combustion... and although many failed attempts have been made to develop Diesel Cycle Wankel engines (SCSI) all were failures... because Wankel KKMs cannot achieve sufficient Static Compression Ratios or IMEP to efficiently and reliably support compression ignition.
    2
  420. @EarthSurferUSA Mazda's RX-8 passed the worlds toughest emissions standards EPA Tier2 Bin5 AND California's CARB ULEV II right up until Mazda was forced to cancel production due to lack of sales. From 1965 - 2012 Mazda never made a net profit from RX sales... the RX brand was in steady decline from 1986 until production ended in June 2012... and the RX-8 alone cost Mazda nearly $3 BILLION dollars in development and production costs that were never recouped....
    2
  421. +Nate Rist You're so full of shit bro... these engines are horribly unreliable... That is why they are obsolete! Why are your cars always broken????
    2
  422. Norton went completely bankrupt trying to sell Wankel powered bikes... the company which purchased the "Norton" registered trademark brand only sells bikes with reciprocating engines.
    2
  423. Mazda lost 3 billion on the RX-8...
    2
  424. Until Charles Kettering invented the electric starter for the internal combustion car... EV companies quickly went bankrupt or switched to ICEs.
    2
  425. Its sad to see people so ignorant of the history of the automobile industry that cling to fake conspiracy theories.
    2
  426. Don't listen to Kevin Loving he's a paid Mining Company shill he shows up in the comment section of most of these electric car videos.
    2
  427. Are you payed by BHP Billiton or China Shenhua Energy????
    2
  428. "Imagine if we'd have gone all in back then where we'd be." Exactly where we are today... because rechargeable batteries are the fatal flaw in electric vehicle technology that will never match the energy density performance of liquid or gaseous fueled vehicles.
    2
  429. Like reliablity...
    2
  430. @Ben Stevens Only the ignorant ones... pre-mixing with 2-stroke oil is not recommended or safe... 2-stroke oil does not extend engine life or meet Mazda's minimum specifications and causes damage to the engine.
    2
  431. @Ben Stevens Only stupid people premix. I know exactly what I'm talking about... and I can prove it son.
    2
  432. @Axel bodat Porsche has won the Le Mans 19 TIMES!!!!
    2
  433. @Axel bodat Audi has won Le Mans 9 TIMES!!! with a Diesel engine!
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  434. @Axel bodat Mazda discontinued Wankel engines and the RX brand because people stopped buy them.
    2
  435. @Axel bodat PROVE IT THEN! Show me where in the FIA rules where they banned the Mazda 787b or Wankel engines, Good luck because you won't find it... because it never happened!
    2
  436. @Axel bodat Why would Mazda race an engine it hasn't made since 2012???
    2
  437. @Axel bodat The FIA NEVER BANNED the Mazda 787B or the Wankel engine... it is not in the official FIA WSCC rulebook because it never happened.
    2
  438. @Axel bodat Mazda voluntarily switched the engines in the Indy Pro Mazda series from the RX-8 Renesis engine to the 2.0 liter 4-cylinder MZR-PM18A because the Renesis was discontinued from production in June 22nd 2012.
    2
  439. @Axel bodat WRONG! Racing has always been and always will be funded by the automakers advertising budget... you don't advertise obsolete engine technology that is no longer sold.
    2
  440. @Ghosts1912 You obviously don't have the slightest clue what you are talking about, Wankel engines are obsolete technology no longer mass produced by any legitimate engine manufacturer in the world including Mazda. Mazda has not unveiled a new production engine in a quarter of a century and development on new engines ended a decade ago.... no new prototypes have been seen since 2008.
    2
  441. That is why the RX-8 flopped... Mazda lost money on every car sold.
    2
  442. Its also why no one makes cars with Wankel engines anymore.
    2
  443. Indeed, the 4-cylinder MX-5 is the best selling sports car under $50,000... THE RX brand however was discontinued do to lack of sales.
    2
  444. We need rotards like flyingdouchy33... good for a laugh!!! hahahaha!
    2
  445. Actually Mazda had been using electronic fuel injection for decades but still had problems... the Wankel suffers from several fundamental flaws that are inherent to its basic geometry that cause poor combustion and typically require more fuel (richer AFR) to prevent it from self-destructing from pre-ignition/detonation and to reduce combustion temperatures to prevent overheating. Modern reciprocating engine have the ability to use ultra high efficiency combustion chamber designs, leaner fuel mixtures and can be optimized for maximum efficiency... the solution for automakers is to abandoned the Wankel in favor of using only reciprocating engines as Mazda and others have done.
    2
  446. All Wankel engines use the 4-stroke operating principle. The Wankel requires 3 revolutions of the crankshaft to complete its firing order sequence instead of 2 revolutions in an Otto engine or 1 revolution in a 2-stroke Benz cycle engine
    2
  447. +Hem57i Australian mining company stand to reap obscene profits from forcing the public to buy EVs.
    2
  448. Or just a crappy car...
    2
  449. There is no explosion inside any internal combustion engine, the air and fuel mixture deflagerates rapidly but less than supersonic speeds... so no shock waves or directional forces... Pascal's Law dictates the pressure is always exerted equally and evenly in all directions.
    2
  450. The rotary engine has been obsolete since the 1930's like the Wankel engine it could no long compete against current engine Otto and Diesel engines.
    2
  451. I love the sarcasm!
    2
  452. Yeah, I remember those commercials and remember when Mazda went bankrupt trying to sell cars that only had Wankel engines and a Japanese bankruptcy court sold Mazda to the highest bidder... Ford Motor Co..
    2
  453. Less powerful than 2-stroke engines.
    2
  454. @K. C.W WRONG! The Mazda 13B series engines have a total displacement of 3.9 liters (2.6 liters) when compared to a 4-stroke Otto engine. The Mazda 20B engines displaces a whopping 5.9 liters! Producing 300 lbs-ft. of torque from a twin turbo 5.9 liter engine is pathetic and frankly a little embarrassing for Mazda...
    2
  455. @18CRFHONDA11 —HellcatGaming62 That's OK... John doesn't know anything about emissions either... he just a crackpot that thinks the Wankel will make a comeback... Lol!!!
    2
  456. @Quincy Gaming You can't make the Wankel better than reciprocating engines... its why all the engine manufacturers (including Mazda) have abandoned the obsolete design.
    2
  457. The Wankel design was very poor in converting air and fuel into heat, and also very poor in converting heat into rotational energy (work) Several inherent flaws reduced it reliability, it is not thermally stable and its seal design is weak and prone to damage by its unstable combustion characteristics.
    2
  458. Very inefficient and unreliable with a lot of exhaust emissions problems too... the design never caught on because it did not offer any real advantages and was plagues with serious problems.
    2
  459. Electric cars have been around for over 130 years and yet internal combustion cars are still under no threat of being replaced by them.
    2
  460. You don't need a crystal ball... just a table of the Periodic Elements
    2
  461. +hellcat1988 Son, engineering is not a "faith based endeavor" don't confuse science with science fiction. There are a lot of unscrupulous people in the world right now try to get you to invest your hard earned money in scams involving battery electric vehicles based on technology that does not exist and will never exist. Even the best experimental rechargeable batteries available right now still do not match the Specific Density of a cheeseburger... any notion that a practical, rechargeable battery that will match the density performance of liquid hydrocarbons is pure fantasy as this would violate the Laws of Electro-chemistry.
    2
  462. Unless you have just discovered a new stable element that has a significantly high number of free electrons in its valance? Everything you are pinning your hopes to is just wishful thinking.
    2
  463. All engines need an efficient combustion chamber, something that is simply impossible to achieve with the Wankel engine design.
    2
  464. Rest in Peace Wankel engine 1964 - 2012
    2
  465. We make them into ash trays... they also make a good inexpensive anchor for small fishing boats.
    2
  466. Yes, Wankel engines are notorious for wearing out very quickly, they are also much less efficient than reciprocating engines too.
    2
  467. "Since when?" Since Rudolf Diesel proved that it was in 1898.
    2
  468. One of the major design flaws in the Wankel concept is its poor combustion efficiency... combustion is typically incomplete with frequent misfires and pre-ignitions due to the poor chamber shape, poor combustion dynamics, long distance the flame must travel and the large surface area. These flaws are a major reason why Wankel engines are no longer manufactured anywhere in the world today... in the engine industry they are now obsolete.
    2
  469. Batteries are horribly inefficient, the major flaw in all plug-in EVs
    2
  470. I thought this company was exposed as a scam a while back
    2
  471. You are very, very confused son... Mazda ceased all production of Wankel engines on June 21st, 2012... and canceled all development of new production Wankel engines 10 years ago in May 2009.
    2
  472. California already has too many solar panels... and its causing energy prices to rise even higher.
    2
  473. Good question, the answer is this will not happen because it is not actually possible for everyone to switch to electric cars... if everyone plugged in an electric car to the grid system would crash, there are no power grids that can handle the increased loads.
    2
  474. +Michael Yachnis I don't know what kind of third world country you live in? But in the United States there has not been a new car sold with a carburetor in over 30 years...
    2
  475. Elon Musk is a con-man... a crook!
    2
  476. If it was too rich it wouldn't run...
    2
  477. @K-H Gaming Really? Then please tell us what the correct AFR should be?
    2
  478. @Steven What do I think? Its not what i think son its what I KNOW. This engine's ideal AFR running on nitromethane fuel( I'm not sure exact what percent is being run here) But it should range (rich of peak) between 3.5:1 and 5.5:1.
    2
  479. @Adam Hale I'm sorry but that is not true... and the reason why you deleted your comment.
    2
  480. You must live in a poor country... where labor rates are extremely low.
    2
  481. Wankel engines are obsolete... Mazda ended development in May 2009... and permanently ceased all production on June 22 2012.
    2
  482. Porsche, Maserati, BMW (2), Volkswagen (2), Audi(2), Toyota, Ford (2), Dodge and a Plymouth..
    2
  483. @ThatGuy Typing That is a very naive theory... and shows a limited knowledge regarding the history and development of the Wankel KKM engine design.
    2
  484. "to make it faster"? pushing it off a cliff comes to mind....
    2
  485. Mazda doesn't sell cars with Wankel engines anymore... just go down to your local Mazda dealer and see for yourself!
    2
  486. Mazda only sells reciprocating engines now.
    2
  487. Don't be sad.. the Wankel is an obsolete design that can no longer compete with the superior performance of reciprocating engines ... good riddance to old obsolete junk like the Wankel engine!!!!
    2
  488. @Kaguya Houraisan 100 million new vehicles were sold last year with reciprocating engines... and with a Wankel engine??? ZERO!!!!
    2
  489. +Flyingdutchy33 The truth always prevails my friend, so there is no need for you to be in denial. Could you direct me to a dealer showroom that has new Wankel powered cars for sale? I can't seem to find any these days... Lol!
    2
  490. +Juan Sanjuan Starting to die? over 100 million ICE powered cars were sold last year... EVs have had NO EFFECT on ICE vehicle sales.
    2
  491. When manufacturing becomes FAT. STUPID and LAZY??? Business leaves!!!
    2
  492. The engine in this video is a WANKEL KKM, not a Rotary. The Rotary type engine is completely different... invented by Felix Millet in 1892, it has a completely different layout similar to a Radial engine but the crankshaft is a fixed axle and the whole engine rotates concentrically around it.
    2
  493. nitromethane
    2
  494. Total displacement 3.9 liters "2X" conversion formula 2.6 liters Tax formula 1.3 liters
    2
  495. The Wankel is a very bad design.
    2
  496. That's why they don't make them anymore isn't?
    2
  497. The worst reliability of any car available, the car's horrible reputation for engine failures is why it was a huge, costly disappointment for Mazda and lead to the cancellation of the entire RX brand.
    2
  498. +MetallicReg You are a fake.. a fraud. What is your vested interest in promoting EVs?
    2
  499. +MetallicReg Yes, your effort was a pathetic attempt... you should be ashamed of yourself.
    2
  500. +MetallicReg Its easy to spot a fake like you... pretending to be someone you are not won't help you in life... you will just be making a fool of yourself as you did here over and over again.
    2
  501. The Wankel has several inherent flaws caused by its basic geometry that have serious negative impacts on thermal and mechanical efficiency as well as combustion efficiency and a very weak, compromised sealing system design. In short, its the Wankel shape that is the causes of most of its problems... unfortunately it one of only a few configurations that can actually achieve the 4-stroke operation of a internal combustion engine.
    2
  502. No, the Wankel engine cannot be adapted to HCCI technology because it lacks the ability to have high swirl, "Quench" type combustion chambers, high static compression ratios or variable valve timing. Wankel engines are obsolete and no longer commercially viable in the engine manufacturing industry... they are a relic of the past.
    2
  503. But in the Wankel the internal parts are only moving at 1/3rd of crankshaft speed...
    2
  504. Well its 2018 now, I guess we can say for sure that you were completely full of shit son....
    2
  505. Then why do Wankel engines with two plugs make more power? This was discovered by Dr. Max Bentele at Curtiss Wright... Even Mazda knew this!
    2
  506. Nah, just people that actually know something about cars
    2
  507. Electric cars were killed off by Charles Kettering in 1915... when he invented the electric starter for internal combustion cars... since then EVs have remained nothing but a small niche market product.
    2
  508. Wankel engines all use the exact same 4-stroke operating principle as Otto type engines.
    2
  509. Mazda is now taking orders for the new Skyaciv-X 2.0 liter 4-cylinder equipped Mazda3 models with delivery for September 2019. https://europe.autonews.com/automakers/mazda-opens-orders-mazda3-fuel-saving-skyactiv-x-tech
    2
  510. +Ed Musick The RX brand was discontinued because they didn't sell anymore... Mazda was tired of losing money on them.
    2
  511. Mazda abandoned development of turbocharged Wankel engines over concerns of reliability with the RX-7 and disappointing test results with the turbocharged prototypes of the 13B-MRP-RE (Renesis). The RX brand was discontinued after decades of declining sales which hit rock bottom by 2006.
    2
  512. The Ford Mustang was always a high volume seller and has nothing to do with the death of the RX brand... Ford was against continuing RX production because of huge financial burden and loses it had on the company, Ford threatened to divest if Mazda launched the RX-8 which was exactly what they did when the RX-8 turned out to be a big flop and Mazda needed a $3 billion dollar bail out from the Japanese government.
    2
  513. BOOST IN> APEX SEALS OUT>
    2
  514. The Wankel engine has some very serious inherent flaws in its basic design that simply cannot be overcome... the unique geometry that makes it possible to run in the first place also restricts is ability to adapt more efficiency that would allow it to compete with other internal combustion designs. One of the biggest problems is the Wankel engines low compression ratio and its poorly shaped combustion chamber... these flaws cannot be changed.
    2
  515. Yes, The Wankel KKM engines functions using the exact same operating principle as the Otto Cycle engine.
    2
  516. @Lyle Stavast But humans sleep at night, they do most of their driving during a day... so that is not the solution... its the root of the fatal flaw in solar power production.
    2
  517. This is a "Benz Cycle" not a Diesel Cycle Wankel engine, this Wankel KKM variant designed by Graupner GmbH. uses the same primitive type of "Glow Plug" ignition system found in most RC model engines. This engine does not utilize compression ignition. The fuel used here is nitromethane which has an octane rating between 110 -117 RON
    2
  518. You are very welcome sir, and in case you were wondering? Several Wankel KKM licensee's attempted to develop a Diesel Cycle Wankel engine but none were successful. Major Diesel engine companies like Deutz, Krupp, Mercedes-Benz, Yanmar, John Deere and Rolls-Royce developed them but all suffered serious problems related to the fact that the Wankel simply cannot provide a high enough static compression ratio and the notorious weak seals were simply not durable enough for a production engine to last long.
    2
  519. @Joakim Carlsen The Wankel no longer offers any significant advantages... which explains why Wankel engines are now completely obsolete in the engine manufacturing industry.
    2
  520. But how will you get the change in volume for intake, compression, power and exhaust cycles??? The piston/rotor has to reciprocate to achieve the change in swept volume.
    2
  521. +Chris Freemesser Some interesting points, certainly the "long tailpipe" argument is a very valid one... and wealthy city dwellers exporting their air pollution to less affluent rural areas certainly has some moral and ethical issues as well. Here in California solar panels have already been mandated and an interesting problem has already appeared... there now is Too Much solar power being generated during mid-day off-peak time and the increase in EVs here has only worsened the states importation of fossil fuel power generated outside the state during peak hours when solar output drops off drastically and stops altogether. The harsh reality is that solar and EV are not very compatible and energy storage technology is prohibitively expensive and far too inefficient to combine with the high per-kilowatt production cost of solar.
    2
  522. +Chris Freemesser Of course the important thing to remember here is the primary barrier that continues to prevent widespread adoption of EV still remains the same... a practical rechargeable battery which delivers the required energy density simply does not exist the Laws of Electro-chemistry do not allow for such a technology to ever match the energy density performance that makes automobiles with acceptable range and recharging times possible... there simply is no known (stable) elements on the Table of Periodic Elements that allows this to ever be possible.
    2
  523. I think California is a perfect example of how the argument of charging EVs with solar does not work.
    2
  524. 124 mile range is terrible... why would anyone pay the same price for a vehicle with LESS performance???
    2
  525. Its not a desirable model due to its notorious engine failures.
    2
  526. With some updated turf tires and some golf bag racks you would have a nice golf cart in a "its so ugly its cute" sort of way.
    2
  527. Yes, very inefficient compared to the typical 2-stroke RC engines still mass produced... which is why these engines designed by Graupner GmbH. are no longer in production.
    2
  528. But compared to a similar sized reciprocating engine the Mazda Wankel engines delivered terrible fuel efficiency and had very poor combustion efficiency which is why Mazda also discontinued them years ago.
    2
  529. Mazda stopped making Wankel engines 7 years ago.
    2
  530. Its sad to see Australia still in the stone age when it comes to dealing with waste.
    2
  531. Its very doubtful that EVs will ever be the future... since 1915 they continue to remain a tiny niche market segment.
    2
  532. I haven't seen any such claims signed into law yet... just a lot of political rhetoric.
    2
  533. Li-on batteries have terrible energy density...a Tesla model S 100 battery only stores the equivalent of 8 gallons of hydrocarbon fuel (56lbs) but weighs a staggering 1,444 lbs even when its fully discharged!!!
    2
  534. But a hybrid internal combustion car can go nearly 100 miles further on the same amount of energy because its not dragging around nearly a 1/2 ton of extra batteries...
    2
  535. No matter how you look at it, plug-in BEVs don't make sense.. they cost more, pollute more and waste more energy... its a dumb idea which is why it has never gained widespread adoption.
    2
  536. +Aaron’s Everyday Projects ! But the Mazda 787b was slow and unreliable.. it lost the 1991 WCS endurance championship to JAGUAR... it lost 20 out of 21 races and had zero poles or fastest laps. There are a lot of false urban myths about Wankel engines... but the facts are they are unreliable and inefficient which is why no automotive manufacturer sells them anymore... not even Mazda.
    2
  537. +Xavier Xavier A General Motors LS engine generates TWICE the torque and HALF the rpm... so by the time you get a shift off an LS swap car will BE LONG GONE and would have left you in the dust...
    2
  538. +Samuel May Please do not post lies and misinformation, All Wankel KKM engines are 4-stroke but require 1080° not 720° to complete their firing order sequence. The Wankel engine is much LESS efficient in terms of combustion, thermal entropy and mechanical efficiency.
    2
  539. Some people are stupid... the RX is shite car!
    2
  540. No. You are stupid because you want a shite car.
    2
  541. @Emmanual Grattan Graupner only made engines for model airplanes, Dozens of other manufacturers developed or produced Wankel engines in a range of sizes from 1/2 horsepower up to 1,000 horsepower pumping engines... most never made it into production the rest have been discontinued for years.. Cheers!
    2
  542. The only crime here is the wealthy elite using false hysteria about global warming to fleece the taxpayers and defraud the government.
    2
  543. +blyndrotor THAT'S RIGHT! the Mazda RX is the most popular car among people that know absolutely NOTHING about cars or racing.
    2
  544. Wankel engines were a commercial failure and are obsolete because they simply cannot compete with the vastly superior performance and reliability of reciprocating engines.
    2
  545. Mazda is still in business today... but only because they make cars exclusively with reciprocating engines now.
    2
  546. +blyndrotor The truth always bears repeating... and the facts are irrefutable.
    2
  547. Mazda discontinued Wankel engine production in June 2012... attacking the messenger is not going to bring the Wankel engine back...
    2
  548. Just the facts here kid... why does the truth anger you so much? if you have accepted the fact that the Wankel engine is obsolete because it was an inferior internal combustion engines design concept.
    2
  549. You certainly are bitter... and definitely in a very deep state of denial, the Wankel engine is no longer developed or produced by any of the original 26 Wankel KKM licensee's (including Mazda) and no longer in series production anywhere in the world... it is an evolutionary dead-end that is no longer able to compete against the vastly superior reciprocating Otto and Diesel engines... which the only thing Mazda makes now. Nostalgia is a seductive liar, you are simply refusing to accept the truth.
    2
  550. @Vinny V Just the facts here vinny... look up the definition of trolling... you will find that in fact you are the one trolling here.
    2
  551. @Vinny V Childish insults won't prove your point (if you had one) and don't make you look smarter either... Cheers!
    2
  552. @Vinny V Have you been by your local Mazda dealer lately? If you haven't? Be sure to ask a salesperson to see a 2019 RX model... Lol!!!!
    2
  553. Indeed... chemical storage batteries are a fatal flaw in the whole EV concept... they can never achieve energy density that can match liquid hydrocarbon fuels, which offer vastly superior range and refueling rates.
    2
  554. What new Tesla Roadster??? No such car has actually been produced and there are no independent third party test results to prove Elon Musk's dubious claims regarding the range and other performance specs... of course the thing to remember is this is not the first time Musk has lied about one of Tesla's products range performance.
    2
  555. The Tesla Roadster, with an estimated price tag of a quarter of a MILLION dollars means you could buy more than TEN new gas cars. OR TWO brand new Porsche sports cars and a lifetime supply of gasoline.
    2
  556. How do you now when Elon Musk is lying? HIS LIPS ARE MOVING!
    2
  557. PRICE is the number one factor in a consumers decision to select one model over another. Of course there is currently no evidence to support that the Tesla Roadster actually delivers the range Musks claims or that Roadster will ever be available for sale or if it is just another one of Musk's fake stunts to manipulate Tesla's stock prices.
    2
  558. It is not my opinion... It is a well known FACT in the field of Science and Electro-chemistry, that a practical rechargeable battery will never match the Specific Energy and Energy Density performance of liquid fuels.
    2
  559. I would not recommend the RX-8 to anyone period. It was without any doubt the worst, most unreliable RX model ever sold... it was so bad it killed-off the entire RX brand for good.
    2
  560. The recently contrived term "Radial-Rotary" is contradictory, an oxymoron... no such design or term is found in legitimate engineering journals or technical publications. The Rotary engine is defined by its crankshaft configuration and its relationship to the engine casing or housing, it is in no way related to engines cylinder configurations or piston shape. In 1967 Graupner GmbH licensed the non-rotary version of the Wankel called the KKM-57 designed by Hanns Paschke and Walter Froede, The KKM was designed without any knowledge or assistance from Felix Wankel and while retaining the Wankel's Orbiting Piston concept completely discarded his rotary engine layout in favor of the conventional shaft arrangement. cheers
    2
  561. Worst car ever? Mazda RX-8!
    2
  562. +Rusty Pudder But the U.S. is not a tiny, insignificant and sparsely populated country with a surplus of hydro-electric power like Norway... the highly socialized Norwegian plan is not scaleable or exportable to the larger, powerful and more advanced countries.
    2
  563. Martin - Test- If Norwegans were more advanced? Then why are they still heating their homes the same way the caveman did?
    2
  564. Rest in Peace Wankel engine 1964 - 2012
    2
  565. As I understand most premium fuel sold in the UK is e5 and is currently limited by law to 5% Ethanol or less. Because the UK is still decades behind the most Western countries in vehicle emissions standards and UK manufacturers lobbied against adopting more expensive Flex-Fuel standards E85 will not be available in your country any time soon.
    2
  566. @Arne Maeschaelck R.I.P. Rest In Peace Wankel Engine 1964 - 2012.
    2
  567. @Arne Maeschaelck All Wankel KKM engines use the same 4-stroke operating principle... they are just mechanically and thermodynamically less efficient.
    2
  568. @Arne Maeschaelck You seem a bit confused...over 100 million cars were sold last year with reciprocating engines... and ZERO were sold with Wankel engines...
    2
  569. @Error If you have any questions about internal combustion engines, Wankel engines or turbocharging? I would be happy to explain them to you in greater detail.
    2
  570. @AA16 Special Edition Not for automobiles or aircraft... batteries can never reach the energy density required for acceptable range.
    2
  571. @Sofa Kingdom Why do amateurs and dilettantes like you feel the need to post false rumors and regurgitate urban myths regarding a topic in which you are not formally educated or sufficiently experienced to speak intelligently on???
    2
  572. @MajorLeague Anyone familiar with engine BUILDING should know that a 10:1 static compression ratio is NOT the ideal BUILD SHEET for ANY turbocharged engine. The more comments you post the less knowledgeable you look kid.
    2
  573. @Sofa Kingdom Its very obvious that you are completely oblivious of the development history of the Wankel type KKM-57 engine design and lack even a basic fundamental understanding of its inherent flaws that have have rendered it obsolete in the automotive industry... even Mazda gave up trying to fix the horrible problems that plagued the Wankel engine right up until production ceased many years ago. None of your childish insults will change these incontrovertible facts.
    2
  574. @MajorLeague Wrong again kid... a 10:1 static compression ratio is well above the ideal limit for any spark ignition engines running more than 1 BAR and the higher the manifold pressure the lower the SCR needs to be... this applies to any fuel type and especially engines like the Renesis that is hamstrung by a horrible combustion chamber architecture that cannot support "Quench"/High Swirl chamber technology or Stratified Charge Mode combustion. The Renesis like all Wankel KKMs has an incredibly weak, fragile internal seals which are easily damaged excessive DCR and IMEP that cause uncontrolled deflageration or high brisance propagation pressure waves.
    2
  575. +Tom Wheeler This is not really true, because internal combustion hybrid vehicles offer the same benefits in traffic conditions but are completely unencumbered by the serious problems with limited range and recharging that make BEVs unable to compete on the market.
    2
  576. Tyranny has risen again... and its name is "global warming"
    2
  577. Not really, the internal components only rotate at 1/3 of crankshaft speed... Diesel engines rev higher than this yet the Wankel was hopelessly unreliable and premature compression loss due to apex seal failures were exceedingly common.
    2
  578. Any car that needs a new engine every 60k miles is certainly something to complain about... that is exactly why the NHTSA investigated the the RX-8 for unusually high number of engine failure complaints... Mazda voluntarily recalled the engines and extended the warranty.
    2
  579. Here is a BRAND NEW ROTARY engine... https://www.youtube.com/watch?v=FvHrbkYEn0k&index=6&list=PLmhSXyOMooSlhNQZShFYxRRiz2pB_jl-g&t=0s
    2
  580. Rust in peace Wankel engine 1964 - 2012
    2
  581. @ro g The Wankel engine is inherently inferior due to the very fundamental geometry that allows it to function as a 4-stroke internal combustion engine... the fact that the shape cannot be significant altered is also why it cannot be significantly improved and has become obsolete.
    2
  582. They actually did try to use these engines in yard equipment like lawn mowers and chainsaws years ago... but they are way too unreliable.
    2
  583. @Onii-chan The Mazda RX has been dead longer than the star of Fast and Furious... in fact, Mazda has not unveiled a new production RX engine since the released of Windows 95!!!!
    2
  584. @Isaac Rodriguez All 26 of the original Wankel KKM licensee's have abandoned the Wankel engine including Mazda. There is no longer a single legitimate engine manufacturer anywhere in the world making them today in series mass production.
    2
  585. @jason pavlak I can almost remember seeing the first the first RX-8 at the Detroit Auto show... but Mazda has not unveiled a new RX model in almost 20 years...
    2
  586. @Isaac Rodriguez Go down to your local Mazda dealer and ask to see the new 2019 RX models... see for yourself that Mazda no longer makes these cars.
    2
  587. @DivineAtheistWannabe You look like the biggest a-hole ever. That's simply judging from your YouTube activity
    2
  588. Love to see a video on the Rotary... this video had a WANKEL.
    2
  589. Not really, people stopped buying them remember?
    2
  590. Jeremy was being his usual sarcastic self... everyone in the automotive world knows the RX-8 is a cheap and nasty shed... not a true sports car by any means.
    2
  591. But EVs are less fun because of the range and recharging flaws... and EVs are much Less economical too!_
    2
  592. You didn't know that fast charging further reduces range and significantly shortens the battery life? Not to mention it makes EVs less energy efficient... Some manufactures will void the warranty if they have been fast charged.
    2
  593. Absolutely not true, after seeing higher battery failure rates Tesla has already altered software and limited the number of times you can fast charge at Rate "C' and recently altered its software to reduce the actual charging to 120kw max... instead of 180kw so basically Tesla has reneged on it promise to deliver unlimited supercharging, Owners simply cannot void the warranty because the software prevents you from supercharging at the max rate. Tesla has also scrapped plans to introduce the 350 kw rate it promised in the future.
    2
  594. +Hachi-Roku Performance Group That comment (like you) made no sense.
    2
  595. +Chad Bremer But, drooling imbeciles like you don't count Chad.
    2
  596. Good question, that is always the first thing a notice about them, cheap and nasty looking plastic interiors that fall apart.
    2
  597. @Quill Maurer No civil or commercial aircraft manufacturer has ever sold a plane with a Wankel engine... this is because manned-aircraft engines must past extremely strict reliability tests. There has never been a successful Wankel engine that is FAA or EASA airworthiness certified.
    2
  598. @Quill Maurer That is an interesting theory he offered, but its nothing but wishful thinking. The Wankel engine was extensively and exhaustively developed by 26 of the world's largest and best engine manufacturers and over 100 of the best universities and research institutes (Like NASA and MIT) spent decades, millions of man hours and billions of dollar developing the Wankel engine design. Mercedes-Benz and and General Motors for example both spent over 100 million dollars a year on Wankel research and development, additionally: Ford Toyota Porsche Rolls-Royce Nissan Alfa Romeo American Motors (AMC) Citroën Suzuki Yamaha Kawasaki BSA Norton Hercules John Deere Ingersoll and Rand Fichtel & Sachs AG Yanmar Diesel Co. Ltd Daimler-Benz AG Deutz AG. MAN AG KRUPP AG IFA VEB Graupner Savkel Curtiss-Wright OMC Wankel-NSU which became Audi.. and dozens of subsidiary companies and and partnership companies which combined represent billions of dollars in research and development besides just tiny little Mazda.
    2
  599. Mazda discontinued these obsolete engines years ago...
    2
  600. OK, great! because a lot of people still don't know that these engines are now completely obsolete in the engine manufacturing industry due to their low efficiency and poor reliability. Mazda was forced to stop offering Wankel engines because sales had become non-existent.
    2
  601. @Timothy W Macron rose to power in May 2017... there was no prior notice to alert the people of France that he would become an evil tyrant... so what exactly is your point?
    2
  602. Freedom of speech and the right to bear arms are guaranteed in America...
    2
  603. All Wankel engines suffer from extremely poor combustion efficiency and the primary failure mode of the seals are due to pre-ignition/detonation issues.
    2
  604. The Wankel engine cannot be adapted to use a modern, efficient high-swirl or "quench" type chamber found on modern production engines such as the PENT-ROOF and WEDGE type combustion chamber designs making them more prone to pre-ignition and miss-fires.
    2
  605. Rechargeable batteries are appalling and horribly inefficient technology... there will never be a rechargeable battery good enough or practical enough to replace liquid fuels in the automobile industry.
    2
  606. LS SWAP IT!!!
    2
  607. FYI; All Wankel KKM engines use the 4-stroke principle
    2
  608. Indeed, which is one of the reasons why this design saw very limited use and is no longer manufactured.
    2
  609. PREMIX IN> APEX SEALS OUT>
    2
  610. Wow! premixing is a stupid, totally false urban myth. You have to be very dumb to premix.
    2
  611. +Tom Lake Charles I own several Rotary engines including a Uberursel UR-II, Le Rhône 9J and a Gnome et Rhône Monosoupape 9.... but I don't understand what that has to do with this conversation...
    2
  612. Not true, Mazda's entry into the Norwegian HyNor program was the least energy efficient internal combustion vehicle tested and was rejected from the long term test series for failing to meet minimum fuel efficiency standards. Mazda abandoned development of hydrogen powered Wankel engines in 2009. The Wankel is very poorly suited to any of the common alternative gaseous fuels including compressed natural gas, propane and hydrogen because Wankel engines are simply unable to generate sufficient static compression ratios to efficiently convert the thermal energy contained in these high octane gaseous fuels.
    2
  613. Sadly the Wankel has been discontinued and is now obsolete.
    2
  614. Well, if the Wankel engine offered any benefits? they would not have become completely obsolete in the engine manufacturing industry... this design could no longer compete with the other successful internal combustion designs still being mass produced in the millions.
    2
  615. Its the battery which heats the glow plug for starting.
    2
  616. The Wankel design cannot support Diesel Cycle operation, and the octane rating of Diesel fuel is too low for optimum spark ignition operation.
    2
  617. There will always be some sucker that will be convinced its worth buying... well, it might make a good golf cart aye?
    2
  618. @Mitch Nelsen The Renesis was a failure... the worst Mazda RX engine ever made. So horribly unreliable it killed off the entire RX brand in 2012.
    2
  619. Today is the 7 year anniversary of the end of Wankel engine production. On Friday June 22, 2012 at 4:30pm the Wankel engine assembly plant at Mazda Ujina #2 shut down and shortly there after was dismantled to make way for a brand new engine assembly facility specifically designed to manufacture Mazda's new highly successful signature Skyactiv line of reciprocating Otto and Diesel engines.
    2
  620. @Pikkon No facts, childish insults... kid, that makes you the troll...
    2
  621. @Ju RI Pikkon ist ein blöder Anfänger!
    2
  622. @Ju RI Die Marke Mazda RX wird nicht mehr verkauft.
    2
  623. @ Ju Ri Genau richtig! Ihre antwort ist unsinnig.
    2
  624. @Ju Ri Was ist dein probleme hier?
    2
  625. Plus its just a shitty Mazda...Mazda is no substitute for a Toyota.
    2
  626. @DarcyDeeAtSea Are you an ozzy or a kiwi?
    2
  627. Communism is a failed experiment, its time for them to move into the real world.
    2
  628. Mazda 4-Cylinder Skyactiv-X Vision Coupe stuns at the 2017 Tokyo Motor Show https://driving.ca/auto-shows/tokyo-motor-show/mazda-vision-coupe-stuns-at-the-2017-tokyo-motor-show
    2
  629. Ernie! Why does your engine not run????
    2
  630. @joe v Yeah, but he wants you to spent $800 for an engine that cannot power anything....
    2
  631. True, the most notable aspect of the RX-8 was its feeble, unreliable engine.
    2
  632. Mazda stated that BSFC (Carnot thermal fuel efficiency) should be in the 50% range... which if your not familiar with engineering terminology would make more efficient than the most efficient automotive Diesel engines currently available.
    2
  633. Yeah, but its still a shitty Mazda... that was more expensive than a new BMW or a fully loaded SUV, the FD sold very poorly because the concept was all wrong, Mazda has a long reputation for making cheap, lower quality, entry level cars targeted at first time buyers... Mazda's attempt to save the dying RX brand by going up-scale targeting the traditional performance marques back-fired and failed miserably.
    2
  634. That sounds great for someone... but not for Mazda... or the poor sucker that has the cost of maintaining one of these poorly designed and executed cars, it must be a challenge to find nice examples in stock condition because Mazda sold so few of them. Mazda discontinued the RX brand because sales had been in steady decline since 1986 and the FD was a loss leader the company simply could not afford to continue losing money on. The notorious reputation for premature engine failures doomed the RX and now Mazda only sells reciprocating Otto and Diesel engines.
    2
  635. No its not, its fueled by nitromethane which is oxygenated and requires an extreme rich AFR.
    2
  636. Tell us what the AFR should be Ernie?
    2
  637. BMW is a brand you buy when you want a better car.
    2
  638. Mazda, the smallest and least successful of all the Japanese auto makers... more famous for its colossal failures than it short history producing automobiles.
    2
  639. BMWs market share is not under any threat from Mazda who has survived by selling cheap, little entry level cars targeted at first time car buyers...I'm sorry if your lower economic status makes you feel inferior... its your lack of education that seems to be holding you back.
    2
  640. And you should recall Ford did not need a bailout... Ford bought Mazda in a court ordered bankruptcy sale after it went bankrupt in the mid 70's. Mazda bought back shares with bailout money from the Japanese Government and 3 major banks to prevent the company from going under.
    2
  641. BMW was building cutting edge aircraft engines long before Mazda was even making corks and bottle caps, long regarded as was on the finest engine manufacturers in the world it developed the first jet engine for military fighter jet aircraft and its designs are still produced and in service in supersonic jet fighters... Mazda has attempted several times to break into the luxury/ high-end performance automobile market but the Eunos, Amati and ɛ̃fini brand were all huge failures and have been discontinued.
    2
  642. +David Schwartz If you have ever lived and driven in Germany? You will quickly understand the different automobile design philosophy... in the States, cars are basically only taxed on sale price and fuel costs are relative low, (just like the quality of the roads here is low) You can't drive across two states here in 2 1/2 hours cruising at 120mph (unless you want to get arrested) High performance cars there are built to an altogether different set of standards and some people prefer this type of car not just for status.
    2
  643. @J Clark The Wankel KKM design was plagued by several very serious flaws in its basic design that caused it to be less reliable than reciprocating engines, most notably is its; -Highly compromised combustion chamber design. -Its very poor internal geometry which is inherently limited. -Terrible thermodynamic efficiency which causes higher operating temperatures. -and its very weak, fragile sealing system.
    2
  644. @Troy Bush Well, Audi won the Le Mans 24 hours NINE TIMES!!! with a Diesel engine and Diesels are the most efficient, practical heat engines available for motor vehicles... even huge container ships. Wankel engines??? They have been obsolete for years now, not even Mazda sells them anymore.
    2
  645. @Mr kool Aid Man Troy Bush stop pretending to be something/someone you are not... you are not fooling anyone here, especially not me.
    2
  646. The future will embrace HCCI technology... Mazda is not alone, Mercedes-Benz, Volkswagen and General Motors are all developing new, super high efficiency HCCI internal combustion engines that will power the cars of the future to 2050 and beyond.
    2
  647. Glow plug ignition, the blue thing is a battery pack.
    2
  648. The internal components of a Wankel engine are only rotating at 1/3 of output RPM.
    2
  649. Its all moot is what it is... the Wankel engine was a dead-end design and is no longer used in engine manufacturing.... obsolete technology.
    2
  650. True, I find obsolete technology like the Wankel engine fascinating... and an excellent example for future generations of how not to build engines.
    2
  651. True, and that is exactly why the Wankel is obsolete now.
    2
  652. @Vladimir Lucifer You clearly do not understand the concept of Latent Heat. When pressure drops the expansion causes the gas to ABSORB ENERGY and thus causing the COOLING EFFECT that is always observed.
    2
  653. EVs are only a tiny niche market segment in the automotive market and some countries cannot afford the $10,000 dollar subsidies per vehicle that are needed to make them affordable to buy.
    2
  654. Despite all the unsubstantiated blogsite rumors and bizarre comments from disgruntled Mazda employees... its no secret that Mazda is no longer in development of any new production Wankel engine... Mazda's board of directors voted in May 2009 to cancel all further development of commercial production engines and ordered all production to cease by 2013.... The very last series production engine was assembled on June 21st. 2012. The RX engine assembly facility at Ujina #2 was dismantled in late 2013 to make way for a new Skyactiv-G reciprocating engine plant. Mazda has not revealed any new engine prototypes in 10 years and they have not unveiled any new production engine in 23 years... if you think Mazda is going to bring them back? You are very naive.
    2
  655. electric cars are still not mainstream... they are still a tiny niche market
    2
  656. +John Livesey Although several countries have made claims as such, Few if any countries have actually passed legislation... as this would simply be economic suicide.
    2
  657. If you are unfamiliar with "shorting stocks"??? it is when investors are betting that the company will fail in the near future.
    2
  658. +HERPY DERPEDY The Wankel has very low mechanical efficiency which is the reason for its very poor torque characteristics and it also why it was never adapted successfully to heavy vehicle use either.
    2
  659. Blown apex seals... no thank you.
    2
  660. The fatal flaw in the Wankel engine that has caused it to become obsolete is the horribly poor combustion chamber design. The high surface area and compromised shape of the Wankel KKM combustion chamber causes incomplete combustion and very erratic ignition and flame propagation. random misfires are typical of the Wankel engine especially when only a single spark ignition is used.
    2
  661. None of the UAVs in current U.S. military service use a Wankel engine. Lockheed Martin Stalker battery-electric motor RQ-170 General Electric TF34 turbofan RQ-21 Blackjack 2-cylinder horizontally-opposed 4-stroke RQ-20 Puma battery-electric motor AAI Aerosonde Lycoming-Enya single cylinder 4-stroke Wasp III electric motor RQ-11 Raven Aveox 27/26/7-AV electric motor CQ-10A SnowGoose Rotax 914 piston engine MQ-9 Reaper Honeywell TPE331-10 turboprop MQ-8 Fire Scout Allison Model 250 turbshaft RQ-4 Global Hawk Allison AE 3007 turbofan MQ-1 Gray Eagle Thielert/Mercedes OM668 4-cylinder turbocharged 4-stroke Diesel MQ-1 Predator Rotax 914F turbocharged four-cylinder engine
    2
  662. You mean Wankel right? The very few Rotary engines left are in museums.
    2
  663. You mean Wankel right? The very few Rotary engines left are in museums.
    2
  664. Indeed, EVs have been around for more than 130 years and it is the exact same fatal flaw that prevents EVs from ever expanding beyond small, limited, niche market applications where they currently occupy.
    2
  665. +Von Huxley Elon Musk is currently worth around $21 BILLION dollars... do you think he wants you to know that there are cheaper, cleaner alternatives to EVs and Solar energy???? HELL NO!
    2
  666. +John Hoo Its the mining industry that is pushing the EVs... they will make billions in copper, lithium and cobalt mines... and could give two shits about the environment as these mines will open up in countries that have little or no regulations.
    2
  667. Indeed, which is why they are obsolete now.
    2
  668. June 21st 2018 marked the 6th anniversary of the end of Wankel engine production, on Thursday June 21, 2012 at 4:30pm the very last commercially available production Wankel engine rolled off the assembly line at Mazda's Ujina #2 plant, the plant was leter demolished to make way for a new Skyactiv-G reciprocating engine assembly line.
    2
  669. Good comment, although I have to add that renewable alternative fuels will not run out... so ICEs are not going anywhere.
    2
  670. 4-stroke but this engine requires oil mixed with the fuel.
    2
  671. +SkuzzyJ Mazda never owned the rights to the Wankel KKM design, Toyo Kogyo Cork ltd ( now Mazda) became a limited licensee in 1961 and was only allowed to produce automobile engines up to 197 hp. Audi (Volkswagen Grouppe AG) acquired NSU and still retains the rights to the Wankel design and trademark
    2
  672. +Jake Garrett Well, if everyone agreed with your opinions? The RX-8 woulds have been a huge sale success... but instead it was a colossal financial failure which forever tarnish the reputation of Mazda and brought a final end to the entire RX brand.
    2
  673. +Trinity Hades "there constantly improving" I'm unaware of any new stable heavy elements recently added to the Periodic Table.
    2
  674. +Trinity Hades Maybe your brothers car is a piece of shit? If you buy the cheapest ICE car and don't maintain it? why would you expect anything more???
    2
  675. +Mazda rx7 No, it just means that you are unable to converse intelligently on this topic or have a functional understanding of the problem ... it is clearly way above your pay grade and education level... cheers!
    2
  676. YES, The hippies seem to forget the market will produce what ever consumers demand... and are willing to pay for. I'm free to build a steam car and run it on dried cow shit if I wanted to... but if everyone did the same thing the price of cow shit would be as much as oil.
    2
  677. +Paul Ciorogar And you sir have no concept of the Laws of Electro-chemistry that limit the Specific Energy and Energy Density of rechargeables... no amount of imagination will change the number of free electrons in the stable elements found on the 'Periodic Table'.
    2
  678. +Paul Ciorogar Well Paul, All I can say is you must have funked Chemistry or dropped out of school... clearly you have no idea what you are talking about.. the problem is not related to particle size, but the number of free electron available in the valance... You get an F
    2
  679. +sam guapo Son, you wouldn't know a chemistry book if one hit you in the face, you certainly would not recognize one by looking at it when it was open either.
    2
  680. +sam guapo Well son! then you should be able to explain to all of us, the Specific Density problem that prevents all rechargeable batteries from matching that of liquid fuels?
    2
  681. +sam guopo So, you are so benighted and unqualified to discuss this topic that you are not even aware of the Specific Density problem???? Specific Density is not a matter of perspective son... it is a cold hard fact that cannot be dismissed so easily... at least by someone educated enough to understand it... you sir are no physicist... you are a fraud.
    2
  682. +Paul Ciorogar Nice try! But you are faking it... you can't cut-n-paste random bits off the internet and think you can fool me son...
    2
  683. +TheSteamBreaker Still bitter about when I made you look like a fool???... post here at your own risk, and maybe check your facts first before hitting that reply button next time.
    2
  684. +TheSteamBreaker You don't intimidate me son... you nothing but a bully and a coward.
    2
  685. +David DiStefano But not impossible, the Mazda RX-8 for example managed to pass the world's toughest emissions regulation (California's CARB) right up until dwindling sales forced its cancellation.
    2
  686. Mazda discontinued these unreliable engines years ago, production ended on Thursday June 21, 2012 at 4:30pm the final RX-8 car ever to be produced rolled off the assembly line, the last RX model to ever be produced by Mazda.
    2
  687. He has aged better than the RX-8 has...
    2
  688. Graupner GmbH discontinued the RC engines years ago and sold the remaining inventory to O.S which recently went bankrupt.
    2
  689. @Jacob Webb If that were true? They would still be in production...
    2
  690. @Shawn Elliot Well, you need a lot of spares if you attempt to run these unreliable engines.
    2
  691. R.I.P. Rest in Peace Wankel engine 1964 - 2012
    2
  692. All Wankel KKM type engines like this one use the 4-STROKE operating principle... the difference between the Wankel and a reciprocating Otto engine is the reciprocating engine completes its firing order sequence in just 720° of crankshaft rotation (2 turns) while the WANKEL engine requires 1080° (3 full turns) to complete its firing order sequence.
    2
  693. Wankel power actually... this is the non-rotary version called the KKM.. The triangular shaped piston actually does reciprocate as it orbits in a planetary motion, a Mazda 13b engine for example has a 30mm stroke produced by the 15mm eccentric-crankshaft throw (offset).
    2
  694. The Wankel engine was an inherent flawed concept... a very poor design in terms of combustion and thermal efficiency.
    2
  695. Well, the key flaw in the design is it cannot use a modern high efficiency "Quench type" combustion chamber like a Pent-Roof or Wedge configuration. and the geometry that makes the engine possible in the first place also severely restricts its mechanical and thermodynamic efficiency as well. Combine that with low compression ratio limits and poor sealing integrity and you have a recipe for poor overall efficiency and higher emissions.
    2
  696. 3:1 RATIO
    2
  697. It would detonate and destroy the apex seals.
    2
  698. Graupner GmbH. made these engines but they were discontinued years ago.
    2
  699. No, i'm saying in some countries where it is cloudy and rainy... problems with photo-chemical smog and particulates from Diesel engines are not a problem due to the lack of atmospheric conditions that cause these problems. The new generation of modern GDI gasoline cars also have the exact same NOx and particulate problems, because the use very similar Stratified Charge Mode Combustion.
    2
  700. And its also slang to call it a "rotor"... the correct engineering term is Orbiting Piston.
    2
  701. Its just a very ugly, overweight sedan body slapped on the excellent MX-5 chassis... the MX-5 is vastly superior car in handling and reliability and its still available... its Mazda's best selling sports car ever!
    2
  702. Mazda lost the 1991 WSC championship to Jaguar with this engine.
    2
  703. It simply proved the fact that Diesel engines are actually better for racing than Wankel engines... which is just sad.
    2
  704. they think you can replace internal combustion engines... those people are very ignorant.
    2
  705. Liberals in office... drug abuse on the streets!
    2
  706. Sell it now... you will thank me later.
    2
  707. The Wankel engine was very inefficient running on hydrogen as well.
    2
  708. NEWS FLASH: THE ROTARY ENGINE SUCKS! https://jalopnik.com/the-rotary-engine-sucks-1773174001
    2
  709. The truth is the Miles M.52 was cancelled because Frank Whittle failed to produce the supersonic capable engine he had promised... Whittle was by this time deep in the grip of drug and alcohol addiction and would be removed from his own company when the program was cancelled. Whittle would be exiled to drug rehab in America to save the new government any further embarrassment...his reputation among his peers so tainted he would never work in the british aerospace industry ever again.
    2
  710. @David Elliot The Miles M.52 also had no chance of breaking the sound barrier first... the cancellation reeks of waste, fraud, incompetence and government cover-up. The M.52 was cancelled because Frank Whittle bodged the engine design and without an engine the M.52 could not proceed. I think you need to check your facts son... the Bell X-1 looks nothing like the Miles M.52 because the Miles M.52 WAS NEVER BUILT.
    2
  711. +movement2contact I'm familiar with the Periodic Table of Elements and the Laws of Electrochemistry.
    2
  712. True, Tesla reeks of stock market manipulation and is perhaps the greatest scam in history, Elon Musk is the only one making money... Tesla is not commercially viable long term without the billions in government subsidies and favorable legislation, its future is very bleak, once government regulations requiring zero emissions vehicles expire or are repealed electric vehicles will once again return to a thing of the past.
    2
  713. A free economy is the greatest expression of democracy... Allow consumers to vote by deciding what products or services they want to buy... and not allow corrupt governments to adopt legislation that promotes, subsidizes or incentivizes products and services of greedy companies with taxes and public revenue. If solar power is what the people want... let them pay for it. Don't force consumers to pay for more expensive solar power if they don't want it... solar only causes rates and taxes to go up... it makes no economic sense whatsoever. Electric customers in California are being charged more for power than anywhere in the country right now while greedy Elon Musk makes BILLIONS of dollars with the help of corrupt officials.
    2
  714. +Andi Marwah Wankel engines are MORE complex than 2-stroke engines... which is why 2-strokes are still made and Wankel engines are not.
    2
  715. Dude! Same engine, same shitty carbs same problems
    1
  716. Dexter Berglund Jesus had absolutely nothing to do with the RX-8 's horrible reliabity problems... How exactly is coil pack failure a maintenance issue? 15mpg is typical for this car, guzzles gas like a V-8... but without all that annoying torque! Well, if it was such a great car wouldn't they still be selling it?
    1
  717. ***** The 16X experimental engine program was cancelled by Mazda in 2009. Aug. 8th, 2011 in an interveiw with Brian Kienleda SAE International    Kiyoshi Fujiwara, Mazda executive officer of product planning and powertrain development, says there was “huge discussion” within the Hiroshima, Japan-based company whether to continue on with a Mazda rotary engine as early as 2008. Fujiwara says economic hardship had some top brass looking for programs to cut, and that by April, 2009 all the Wankel engine programs were on the cancellation list. Continuing development of the 16X and all other Mazda Rotary programs were halted on May 8th 2009 when a memo was sent to his department stating that all rotary development was to end effective immediately..
    1
  718. RX-8s usually are broken... its hard to keep one running
    1
  719. Your apex seals are burned up.
    1
  720. Han Li Why don't you read it?
    1
  721. Han Li ...or can buy.
    1
  722. Un1qZ Wankel engines don't require any particularly special starting or driving procedures unless the apex seals are already damaged and compression is less than normal. The common symptoms of low compression in the Wankel are hard starting, misfires and carbon build-up. Its a common myth that these special procedures prevent damage... in fact the only thing they accomplish successfully is mask the symptoms of premature engine failure. While 50 hp per liter is ridiculously low for a performance engine... 75 per liter is nearly as pathetic, many modern high performance sports cars generate over 130 hp per liter. There is so much confusion, ignorance and just plain old wives tales about these now obsolete engines.. I'm not surprised when the so called "experts" can't even tell you who designed the Wankel KKM-57  
    1
  723. Un1qZ I don't think you understand the original comment or the unique problems that plague the Wankel design... Then why did you mention it? 
    1
  724. Jack Adair You should take good care of any car worth keeping.. The problem is the Wankel tend to failure without any warning.. regardless of how you drive it or maintain it.. Beware, you have been for warned. 
    1
  725. ***** Just the facts here kid..I don't make excuses for other people's ignorance.. get your story straight and you won't look like a fool.. or a troll like you.
    1
  726. ***** maybe you should check your facts before you continue to make a complete fool of yourself
    1
  727. ***** Your welcome to make an attempt to disprove my facts... the onus is on you..
    1
  728. ***** You still have lot to learn son...
    1
  729. ***** Run along kid... go troll elsewhere.
    1
  730. ***** How ironic... Clearly you are.
    1
  731. ***** Clearly you lack the ability comprehend the information and that you intentions are clearly that of a belligerent troll.
    1
  732. ***** Because you clear lack the ability to present an intelligent argument.. you are just a troll
    1
  733. ***** Its very apparent that you lack the educational background or a functional understanding of the concept of "Argument-Counter Argument"
    1
  734. ***** The onus is on you.. I stand by all of my comments as 100% factual and true..
    1
  735. ***** You sure sound like a troll.. Lol!
    1
  736. ***** TROLL..
    1
  737. Joseph Carprpenter The facts stand on their own merit.. the burden is on you to attempt to disprove something that is factually true..
    1
  738. Joseph Carprpenter If you cannot form a comprehensible or logical counter argument? Then you are either simply too lazy or uneducated to understand otherwise.. in other words just another mindless troll..
    1
  739. Joseph Carprpenter No I am correct.. by logic, if you do not possess the ability or intelligence to form a declaration and then present an argument to support it? Then you have no credibility to challenge my statement... you do not have the knowledge or information on the topic to refute my facts.
    1
  740. DoomsdayMelody91 Stupid or lazy? I suspect youre both but I will let you answer for yourself
    1
  741. DoomsdayMelody91 Funny, I was thinking the same about you.. lots of "cute" comments but nothing of substance to support your theories... and nothing that disputes the facts here.
    1
  742. DoomsdayMelody91 Dude seriously.. go troll somewhere else.. next time pick something easy.. that you actually know something about OoooKayy?
    1
  743. +Joseph Carprpenter Mazda's CEO revealed RX-9 is an internet hoax.. confirms there is no RX-9 or plans to build another RX sports car. http://www.mazda-motors.com/news/mazda-says-no-to-rotary-engine-and-larger-sports-car/
    1
  744. +Theman703 Yeah, quite a feat in the 1950s... but that was over 60 years ago...
    1
  745. +Jeffiekins But the Honda doesn't have a 3.9 liter engine like the Mazda..
    1
  746. +Jeffiekins "but it's got 225-235 HP." Yeah but its only got 159 lb-ft of torque and nothing down low...
    1
  747. +VestedUTuber I invite you to go down to your local Mazda dealer and ask the salesman to see the new RX models....
    1
  748. +VestedUTuber Its not a claim, ITS A FACT... Mazda no longer manufacturers Wankel engines or the RX brand... this is an irrefutable fact that can be easily proven conclusively by visiting your local Mazda dealer.
    1
  749. +VestedUTuber One only has to look at RX sales figures to see that it TANKED!!!! big time... or the fact that the RX brand sales coincided with Mazda's mounting debt and dissolution of their partnership with Ford over this colossal blunder... Mazda became insolvent and required a 3 billion dollar government backed bailout loan, the firing of then president Hisakazu Imaki and several veteran executives, and the new boards emergency vote in May 2009 to cancel further development of Wankel engines and set a dead line to permanently cease all production no later than 2013.
    1
  750. +VestedUTuber Two of Mazda's most recent CEOs have both stated publicly that the company needs to sell around 100,000 units per year of a new model to recoup development and production costs and earn a profit for the company.. The RX-8 was a big flop on initial release and continued to fall limit-down well below sustainable volume. If you are too lazy to confirm this yourself? here is a link below.
    1
  751. +VestedUTuber Here is a chart from ANDC http://www.autonews.com/apps/pbcsi.dll/storyimage/CA/20110822/OEM01/308229979/V2/0/V2-308229979.jpg
    1
  752. +VestedUTuber Here are some rather bleak US and Canada sales numbers too http://www.goodcarbadcar.net/2011/01/mazda-rx-8-sales-figures.html
    1
  753. +VestedUTuber By 2008 only 3,368 RX-8s were sold in entire the U.S. market. And a mere 543 units in Canada... Mazda's two largest sales markets.
    1
  754. +VestedUTuber Don't you think you have embarrassed yourself enough already??? Well, Mazda's CEO has said publicly that the company needs to sell 100,000 units per year to make a new model profitable... you do the math.
    1
  755. +VestedUTuber Did you expect to win a prize or something? A balloon or a sucker maybe??? what are you like 12 years old?
    1
  756. +VestedUTuber The RX-8 was the only model left in the RX Brand... And the RX brand was discontinued over half a decade ago.
    1
  757. +VestedUTuber I'm certain Mazda stock holders would like to see those number too! But unfortunately that is one of Mazda's biggest (and most embarrassing secrets).
    1
  758. +VestedUTuber You are surprisingly articulate for a 12 year old... its too bad you are not old enough to have acquired the knowledge and wisedom of a well educated and mature adult.
    1
  759. +VestedUTuber "Mazda Rotary®" was a registered trademark of Toyo Kogyo Cork Ltd. (now Mazda Motors) for its version of the NSU-WANKEL® KKM-57 engine design. Mazda formerly sold the Mazda Rotary® under the now defunct "RX" brand model line but was discontinued June 22, 2012 when production permanently ceased. Mazda currently sells the Skyactiv-G® brand under the _"MX", "CX", and "MAZDA" brands in the North American market.
    1
  760. +VestedUTuber The Corvette is currently sold under the Chevrolet brand (a Division of General Motors) although it was originally intended to be its own brand.. the 1953 prototype even featured a unique non-Chevrolet badge...
    1
  761. +VestedUTuber You don't seem very familiar with the history of Mazda and the Wankel engine... the Wankel almost killed the entire company TWICE!
    1
  762. +VestedUTuber Mazda also went bankrupt in 1975... after it had switched to only producing Wankel engine vehicles..
    1
  763. +VestedUTuber Mazda has never manufactured a Rotary engine... it manufactured WANKEL KKM engines at first under the NSU-WANKEL® trademark... then under its own Mazda Rotary® brand name to avoid continuing to pay a 40% royalty to NSU (now Audi).
    1
  764. +Luke Spencer The V-8 engine is as popular as ever... no one uses the Wankel in any major racing series... and why would they? No one sells Wankel engines anymore.
    1
  765. +H Burke The Piston(rotor) speed in the Wankel is only 1/3 of crankshaft speed, it takes 3 full revolutions for the Wankel to complete its firing order sequence... the Otto and Diesel engines only require 2 complete turns.
    1
  766. +H Burke When looking at Total Displacement or Corrected Displacement @720° The Wankel produced significantly LESS horsepower-per-liter which is why the Wankel never saw widespread adoption in high horsepower applications and eventually became obsolete in 2012.
    1
  767. +Equallysplitintwo Not very impressive and the torque was still pathetic. The Renesis has a total displacement of 3.9 liters.
    1
  768. +Equallysplitintwo Its not a 1.3 liter.. and it was a big flop, RX-8 sales were dismal.
    1
  769. +Equallysplitintwo NO, its a 3.9 liter in true displacement Total displacement 3.9 liters "2X" conversion formula 2.6 liters Tax formula 1.3 liters
    1
  770. +Tsoliassssssssssssss Few people outside of engineers that are experienced with the Wankel KKM design are actually familiar with its fundamental operation... If you were knowledgeable as such you would have understood the key concept regarding its 3:1 internal ratio and how this ratio relates to its firing sequence and its true displacement.
    1
  771. +Tsoliassssssssssssss The 13B series engines are all 3.9 liter in true displacement Total displacement 3.9 liters "2X" conversion formula 2.6 liters Tax formula 1.3 liters
    1
  772. +Tsoliassssssssssssss Prove it kid... please explain how the Wankel KKM is a 2-stroke when every qualified engineer understands its a 4-stroke principle.
    1
  773. +Tsoliassssssssssssss That comment just makes you sound like you don't understand the difference between engineering and quantum physics.
    1
  774. +Tsoliassssssssssssss In the 13B series each orbiting piston(rotor) has 3 sides forming 3 combustion chamber volumes, each with a swept volume of 654cc. times the 2 housings is 6 and equaling 3,924cc. The other important thing that people without formal engineering experience fail to understand is that a 4 cycle Otto or Diesel engine completes its firing sequence in 720° of crankshaft rotation while the 4-cycle Wankel KKM designs required 1080° of rotation to complete its firing sequence... These two important and often misunderstood details are the basis of the commonly used "2X" conversion formula for accurately "comparing" the displacement of the Wankel with other designs.. Any questions? I would be happy to explain in more detail...
    1
  775. +Tsoliassssssssssssss Just the facts here kid, Most engineers, Automotive tax codes and motorsport sanctioning bodies use the "2X" conversion formula, fully recognizing that the "NSU Tax Method" is contrived and without technical merit.
    1
  776. +Tsoliassssssssssssss Here is a respected peer-reviewed automotive engineering reference source from _Encyclopedia of Automotive Engineering: Engines - fundamentals, Volume 1, Part 1 Chapter 10 Page 532, Section; 2.2.3.2 quote; "Wankel engines work with the four-stroke principle" https://books.google.com/books?id=ANfdCgAAQBAJ&pg=PA532&lpg=PA532&dq=wankel+4+stroke&source=bl&ots=gzrnDiXhUe&sig=wVwxnnTy68GEfgnIl6orujQSUgI&hl=en&sa=X&ved=0ahUKEwiq7aKp9Z7ZAhVP42MKHQRAAsc4FBDoAQg6MAM#v=onepage&q=wankel%204%20stroke&f=false
    1
  777. +Aor87 The truth bears repeating son... you really need to accept the facts and move on.
    1
  778. +Aor87 Last month marked the 6th anniversary of the end of Mazda's RX brand and the end of Wankel engine production.
    1
  779. Aor87 That's right little troll boy... you don't intimidate me.
    1
  780. +Aor87 Thank you for proving my point...
    1
  781. Boost in> Apex seals out>
    1
  782. Rob Dahm needs to go to rehab... Adderal is a HELLAVA DRUG!!!!
    1
  783. Yeah cocaine is bad... ask Rob he looks like he knows from personal experience...
    1
  784. +Pottu007 Sorry, but you seem very confused on this technical point, Each orbiting piston(rotor) has 3 chambers, each displacing 654cc's times 2 is 6. Or 654cc's x 6 equals 3,924cc's (3.9 liters) of Total Displacement.
    1
  785. +Pottu007 Now, that is fine if you want to compare one Wankel engine to another... but if you want to compare a Wankel engines displacement to a reciprocating 4-stroke like an Otto type engine? You must convert the number of degrees of rotation in the firing order... The Wankel requires 1080° of crankshaft rotation while the Otto engine only requires 720° of rotation.
    1
  786. +Pottu007 So the Wankel only displaces 4 x 654cc's in 720° So the displacement of a Mazda 13B series engine is 2,616cc or 2.6 liter. This system is widely adopted and accepted by Engineers, automotive experts, insurance companies, government tax collection agencies and Motorsports sanctioning bodies.
    1
  787. +Pottu007 Are you too poor to own a real sports car?
    1
  788. +Pottu007 If you are looking for a affordable, reliable 4-door car??? The Toyota Camry is a much better choice.
    1
  789. Well, if you can't afford a V-8 What does it matter to you?
    1
  790. +Pottu007 Its better to actually know something than to pretend you know something... you should stick to what you know... and that is not anything to with cars son.
    1
  791. +Sideways Motion The truth bears repeating... Then please explain to us WHY? Wankel engine are either unsuccessful or simply not used in application where Power-to-Weight Ratio performance is critical??? In fact WHY is the Wankel engine completely obsolete in the engine manufacturing industry???
    1
  792. +Sideways Motion All 26 of the original Wankel KKM licensee's including Mazda have abandoned development and production of Wankel engines... The irony? Mazda was the only one of the original 26 that was committed to selling an exclusively all Wankel powered product line, now only sells reciprocating engines and announced last year the company is committed to producing reciprocating engines to 2050 and beyond.
    1
  793. +Slideways Motion Oh! you really are a wealth of tired-out lame excuses... The Wankel engine was not banned by the FIA... there is zero evidence to support this popular but completely false urban myth.
    1
  794. +Slideways Motion Then why was the Wankel so unsuccessful in world class racing??? The Wankel has no advantage in Power-to-Weight Ratio performance... this is yet another False Urban Myth.
    1
  795. News flash: the rotary is a garbage engine. https://jalopnik.com/the-rotary-engine-sucks-1773174001
    1
  796. Only idiots bought them... so only idiots driving them. A new engine is well more than the value of these cars now... Not true, the RX-8 was designed to be high volume seller directed at a mass market, it was just horribly designed and constructed and had a terribly unreliable engine. There is a good reason these RX cars and the Wankel engine are discontinued... Because consumers simply refused to buy them and they didn't even meet Mazda standards anymore.
    1
  797. +Dunn RX owners are a very delusional group of car nerds, their lack of automotive knowledge is the common bond between them and its their general ignorance of automobiles the reason why they bought one of these horribly unreliable cars in the first place, BECAUSE THEY DON"T KNOW ANY BETTER.... ignorance is bliss as they say.
    1
  798. +Dunn The Wankel is an OBSOLETE design that is not coming back... All 26 of the original Wankel KKM licensee's have completely abandoned development and production of these deeply flawed engines... The Wankel was a relatively short lived commercial failure and a nothing more than an evolutionary dead. Wankel engines are no longer manufactured in series production anywhere in the world today, the last to discontinue them was Mazda and they ceased production several years ago.
    1
  799. @Robotic Venom Nonsense! The true, actual displacement is 3.9 liters of total displacement, The "Tax Method" was contrived by NSU without any consideration for actual or compared displacement and is used solely to circumvent vehicle registration tax fees and a marketing ploy to offset the Wankel's poor fuel economy with a perceived saving in taxes. All Engineers, Government agencies and Motorsport sanctioning bodies use the widely accepted "2X" conversion formula for comparing the 4-stroke Wankel KKM engine to other reciprocating 4-stroke designs, This formula allows the Wankel to be more accurately calculated at 720° of crankshaft rotation rather than its actual 1080° needed to complete its firing order sequence. Any questions? I would be happy to teach you more about this.
    1
  800. @Egon1982 Mazda confirms 100% Electric and Plug-In Hybrid but No Rotary Range Extender. https://thedriven.io/2019/06/11/mazda-confirms-100-electric-car-model-for-2020/
    1
  801. @The Masoko Indeed, millions of new cars are still made with V-8 engines... its just the Wankel engine that is dead.
    1
  802. @The Masoko People stopped buying them, so Mazda had no choice... switch to reciprocating engines or go out of business... it was that simple.
    1
  803. @Gehtdi anschasau WRONG, "Tax displacement" is not the same as true or total displacement. All engineers, government agencies and Motorsports sanctioning bodies recognize the '2x formula' for converting the 1080° firing order to the more common 720°.
    1
  804. Mazda is now taking orders for the new Skyaciv-X 2.0 liter 4-cylinder equipped Mazda3 models with delivery for September 2019. https://europe.autonews.com/automakers/mazda-opens-orders-mazda3-fuel-saving-skyactiv-x-tech
    1
  805. @Gehtdi anschasau You do not understand anything about automotive engineering do you? NO, because a 2-stroke motorbike has a 2-stroke engine, All Wankel engines are 4-stroke. So we do not measure displacement on a Wankel like a 2-stroke.
    1
  806. @Gehtdi anschasau These two important and often misunderstood details are the basis of the commonly used "2X" conversion formula for accurately "comparing" the displacement of the Wankel with other designs..  The contrived "Tax Displacement Method" was created by NSU in Germany before Mazda purchased the design from them, as Japan had a similar tax code regarding tax per engine size they simply kept the same method for calculating displacement.
    1
  807. @Gehtdi anschasau American designs used total displacement instead of the "Tax formula method to calculate the displacement as the U.S. uses Gross Vehicle weight and MPGs to tax vehicles for registration not engine size. For example, the General Motors RC2-206 Wankel was the same swept volume of the Mazda 12A Wankel but GMs engine had a published displacement of 206 cubic inches (3,380 cc).
    1
  808. @Gehtdi anschasau But that is using the contrived "Tax Displacement" method, Engineers, Motorsports sanctioning bodies and government revenue agencies all classify the Wankel under the "2X" conversion formula eg; a Mazda 13B as 2.6 liters instead of its true displacement of 3.9 liters.
    1
  809. @Gehtdi anschasau Any questions? I would be happy to explain in more detail...
    1
  810. @Gehtdi anschasau Yes, you look like an uneducated fool right now so best you go run and hide... I'm sure you are afraid to speak to people smarter than you out of fear of being exposed for what you really are... a rank amateur.
    1
  811. @Gehtdi anschasau Yes, please come back when you are old enough to vote and have learned how to calculate displacement... myself and the truth will still be here waiting for you.
    1
  812. @Skizzy 1 Why not? You have to be stupid to buy one???
    1
  813. @Fabian Cabrera Actually its a 3.9 liter... so 230hp really sucks, with 235 moving and seal related parts, many o f them being the tiny fragile sapex seals and springs it has half the reliability of a reciprocating engines. New car buyers avoided these horrible cars like the plague... which is why Mazda was forced to discontinue them years ago.
    1
  814. @Fabian Cabrera You might want to fact check kid... you just cut-n-pasted a wiki page...
    1
  815. @Fabian Cabrera Yes, exactly my point... of course you weren't going to write it out yourself.... you don't have the slightest clue what you are talking about son.
    1
  816. @Fabian Cabrera Of course not, the fact that you are quoting wiki just proves you are no expert and certainly not educated or experienced enough to speak intelligently on this topic.
    1
  817. @YMC-DAB420 Thank you for proving that you do not understand what displacement is or how it is calculated.
    1
  818. @YMC-DAB420 Indeed, you comments gave that away... Thank you. If you have any questions regarding what is displacement or why Mazda did not quote the actual displacement of its Wankel engines? I would be happy to explain it for you.
    1
  819. @YMC-DAB420 It is very simple... each orbiting piston(rotor) has 3 sides forming 3 combustion chamber volumes, each with a swept volume of 654cc. times the 2 housings is 6 and equaling 3,924cc. The other important thing that people without formal engineering experience fail to understand is that a 4 cycle Otto or Diesel engine completes its firing sequence in 720° of crankshaft rotation while the 4-cycle Wankel KKM designs required 1080° of rotation to complete its firing sequence...
    1
  820. @YMC-DAB420 These two important and often misunderstood details are the basis of the commonly used "2X" conversion formula for accurately "comparing" the displacement of the Wankel with other designs..
    1
  821. @rst214 HD Nah, Mazda admitted it lied about the horsepower specs of its RX-8 models... offered to buy back cars and offered compensation to owners to avoid government fines.
    1
  822. No, they don't... the NHTSA investigation of customer complaints regarding premature engine failures in the RX-8 proved otherwise... and Mazda did not challenge its findings, they voluntarily recalled over 30,000 Renesis engines for premature failures.
    1
  823. +Yellow Waffle Good for you... don't buy an RX-8, they are all POS.
    1
  824. +Doug Bolster Don't get stuck with a bad investment... avoid these cars like the plague
    1
  825. +Doug Bolster I agree, both good choices if you are into Japanese cars
    1
  826. +mischiefpwns You would have to live in a poor country with high import duty? Or be very foolish to pay that kind of money... You can pick-up an RX-8 with a blown motor for almost nothing..
    1
  827. +sjagain But the world's strictest emissions standards are California's CARB regulations... and the Mazda RX-8 continued to meet these standards right up until production ceased in 2012 due to poor sales.
    1
  828. +Cypher101 The NHTSA investigation proved it had nothing to do with how you take care of the car, even engines that had been cared for properly still failed prematurely.
    1
  829. +Christian Javier Well, if its a RX-8 its not a good car... its a very bad choice. but if you do buy one be sure to pay as little as possible and plan on replacing the engine immediately. The most you should expect to pay in the United States is around $500 dollars in the UK about £ 1,000 for cars in very good or better condition, cars in rough shape can be had at scrap prices these days.
    1
  830. @Skizzy 1 Your compression died a long time ago son... never premix this urban myth is monumentally stupid and only damages your engine.
    1
  831. @RockSolitude Just the fact here son, trolls like you need not respond.
    1
  832. @TheMatt999 You sir are clearly not sufficiently educated or experienced to speak intelligently on this topic... please go spread your ignorance elsewhere.
    1
  833. @TheMatt999 Son, you need to learn the difference between a Radial and Rotary type engine... it is very apparent that this distinction in fundamental engine layouts completely escapes you...
    1
  834. @TheMatt999 Angry little trolls like you do not intimidate me in the slightest... You cannot change the facts with childish insults, because the truth is irrefutable son.
    1
  835. @TheMatt999 It is very easy to spot ignorant trolls like you by reading your benighted comments... they are always filled with bitter hatred, childish insults and completely devoid of any rational or logical argument... you should be ashamed of yourself kid, its time for you to grow up and act like an adult.
    1
  836. @TheMatt999 Kid, you wouldn't know a Rotary engine if one was dropped on your foot... why don't you read more and troll less... who knows? You might get into engineering school and learn the difference between a Rotary and Radial... perhaps then you won't look so foolish and uneducated in a technical discussion on a topic of engineering like this one.
    1
  837. 18tangles Are you calling Wilbur a Fat American...????  lol 
    1
  838. Wilbur Finnigan funny i was thinking the same thing... you seem to have nothing better to do then interject insults into others conversations....  
    1
  839. Wilbur Finnigan As expected... you should find some kind of hobby 
    1
  840. Wilbur Finnigan but not an expert on the Aviation industry, Military aircraft or Aero engines...???  I don't need to even ask... your comments have made that very apparent
    1
  841. Wilbur Finnigan Actually most of the convicted british traitors that were not executed were deported and imprisoned to Australia... the brits sort of considered Australia one great big prison camp.... full of traitors, murders, thieves and general social refuse.... 
    1
  842. Wilbur Finnigan> did not..... 
    1
  843. 18tangles I confess I really didn't think  you would be game Tiger Moth, you seem alot smarter... but Wilbur on the other hand is very predictable. Cheers mate! 
    1
  844. Your old 4runner will still be running long after your RX8 has died... No, not really... the maintenance is not that bad but the very short and unpredictable service life of the engine is a real problem, removing the engine and overhauling it when one of the seals fails... repair costs can be over time more than the value of the car.  
    1
  845. Juxhen Cubaj Wankel IS OBSOLETE 
    1
  846. good luck... youre gonna need it
    1
  847. Still a POS
    1
  848. Adam Canada It started losing compression long before 130k..
    1
  849. +snfas That is highly doubtful at 125k your engine is probably still running albeit very poorly.. and compression test will undoubtedly show that your compression is well below minimum spec. Premature engine failure is not something that requires patience.. it only requires that car buyers are complete unaware that reciprocating engines offer superior performance, efficiency, reliability and service life.. But new car buyer opted to buy cars without Wankel engines... leaving Mazda no choice but to cancel the troubled and unprofitable RX line.
    1
  850. Sorry Terry, YOU WISH!!!!
    1
  851. The Mazda Wankel engine has a long and notorious reputation for unreliability and shorter service life than comparable engines.. it was a major factor in the RXs poor sales and eventual cancellation.
    1
  852. +terrance hill You're just in denial of the truth
    1
  853. +terrance hill "ur names are similar" Lol!!! you have quite the imagination there Terry.. Hahaha
    1
  854. +Nicolas Broszky He is talking about the Mazda 13B-REW engine from the RX-7
    1
  855. +terrance hill "Mazda Rotary" is a DEFUNCT Brand name of WANKEL engine...
    1
  856. Actually the correct "type" is the Orbiting Piston Engine" but it was invented by Felix Wankel so he gets to name it...
    1
  857. +Nicolas Broszky Yeah he is a very hostile troll.. he is also an alcoholic..
    1
  858. @No One Optima Batteries die almost as fast as a Wankel engine...
    1
  859. @dominic draughn Not much to tell, Mazda no longer produces Wankel engines anywhere in the world... they are obsolete technology now which is probably why your generation does not understand anything about them.
    1
  860. Dan Shipman-Toon Sorry Dan, its not real.. you have been lied to, led to believe rumors that are simply untrue.. Read the most recent articles; http://www.autoblog.com/2016/05/24/mazda-rx-vision-rotary-production-chance-opinion/
    1
  861. Dan Shipman-Toon The RX-Vision is only a concept.. and so is its imaginary engine.
    1
  862. Rotming The "Mazda Rotary®" is a now DEFUNCT brand name of the Wankel engine formerly sold by Mazda Motors. Mazda (the very last manufacturer) ended development and production some years ago.. Making the Wankel now an obsolete engine design.
    1
  863. Rotming Mazda's board voted to ended development of Wankel engines by May 2009.. and to end production by 2013... R&D ended in May 2009 and production actually ended 6 months early due to poor sale predictions on June 21 2012.
    1
  864. Rotming Just rumors.. just like the rumors that the RX was coming back again in 2014, 2015,2016 and again this year in 2017... all have turned out to be false....
    1
  865. Rotming You don't know much about the history of the Wankel kid... its been dead for a long time before it finally went out of production... no one should have been surprised... it was a long time coming.
    1
  866. Rotming The Wankel never matched the overall performance of other ICE designs and only saw very limited production in small lightweight sports cars where its inherent weaknesses were less obvious... but not anymore... its no longer manufactured for ANY applications in series mass production and hasn't for over 4 years.
    1
  867. Rotming No, the Wankel engine and the Orbiting Piston Engine Concept are both obsolete... the Wankel was simply the only design of this type to see very limited commercial success..
    1
  868. Rotming The Wankel has simply reached the logical conclusion of its development history and has been abandoned... More successful ICE designs have shown and proven to have further development potential while the Wankel has not... the Wankel design never provided significantly better efficiency or performance or could match the superior reciprocating ICE designs that have rendered the Wankel obsolete..
    1
  869. Rotming WOW... are you really that uninformed and confused??? Steam powered cars are obsolete too because they CANNOT be improved.. they are less efficient by their very operating concept and inherent flaws of thermodynamics
    1
  870. Rotming WTF are you rambling about????Hemi V-8s ARE OBSOLETE and have not been used in production automobiles since the 1970's!!!!!!
    1
  871. Rotming WOW! You are an IDIOT dude...
    1
  872. Rotming HEMI® spelled in all caps is a BRAND NAME and registered trademark of Fiat SpA. Chrysler div.
    1
  873. Rotming But you just said "Everything can always be improved" which of course is not true... the steam car a perfect case in point
    1
  874. Rotming But the steam car can never be better than an ICE powered car... this fact has been known and well understood over over 100 years.. just as the Wankel can never be better than the Otto or Diesel.. this has been known and well understood for over 3 decades now...
    1
  875. Rotming No it cannot, that would violate the laws of thermodynamics.. particularly the Carnot Cycle Formula... you see there are certain concepts and laws of engineering and science that you do not yet understand...
    1
  876. Rotming No, its not like shopping for a smart phone.. its far more complex... and obviously far too complicated for your limited knowledge of both engineering and the automotive industry in general if you attempt to make such feeble, narrow minded analogies.
    1
  877. Rotming But its already be proven that the Wankel cannot compete.. otherwise it would have been a commercially viable design instead of a commercial failure..
    1
  878. Rotming NO, Just the facts here! Most unlike your particular fondness for fantasy and speculation on topics which you have little to no education or knowledge.. No legitimate engineer or automobile company is seriously researching or developing steam engines for automobiles.. that implication is shear nonsense! Monsieur Carnot published his formula for calculating the different types of heat engines (both practical and theoretical) in 1824! Steam can never reach the same practical thermal fuel efficiency as ICEs... which is why steam car became extinct nearly overnight upon the introduction of the electric starter motor in 1915
    1
  879. Rotming THe Wankel could never match of compete with Otto or Diesel engines before.. (they never saw widespread production or use) and the gap between fuel efficiency and performance increases to widen making th Wankel even LESS likely to compete against better reciprocating technologies which simply cannot be adapted to the orbiting piston concept at all. The Wankel was a COLOSSAL commercial failure with all of its licensee's either no longer in business or having suffered significant financial losses associated with its development and eventual abandonment after introduction or like most companies canceled before production ever began... (Mercedes-Benz estimated over 100 million US dollars lost) you see there is so much that you don't know about the history of the Wankel KKM... your wealth of ignorance on the matter is astounding.
    1
  880. I'm sorry but you are wrong, there are no automobiles in current production using a Hemispherical combustion chamber design... now you really look like a fool.. I'll bet you delete that last comment...
    1
  881. OH!!! NEVER MIND! Looks like you deleted your ignorant comment already..LOL..!!!!!!!!
    1
  882. Rotming Then why was the Wankel design abandoned?????
    1
  883. Rotming Yes I was aware... but are you aware that EVs still have the exact same critical flaw??? Its called a BATTERY.. and its the world's least efficient means to convert and store energy for use in automobiles.. which s exactly why electric vehicles never catch on and never serious compete with ICEs..
    1
  884. Rotming You seem complete unaware.. totally ignorant on this subject, steam can never match the efficiency of a ICE powered automobile.. THAT IS WHY STEAM CARS HAVE BEEN OBSOLETE FOR 100 YEARS!!!!!
    1
  885. Rotming And you sir seem to have absolutely no knowledge of engineering or the automobile industry...
    1
  886. Rotming How can you be so naive? Something that cannot be confirmed or denied because there is no evidence it exist is called a RUMOR... and should be treated as such.. But giving the CONTEXT any rumors of a new Wankel engine or a new steam powered car are both equally nonsensical and highly unlikely...
    1
  887. Rotming Here again you are just speculating.. Emission did not stop Mazda from manufacturing them before.. a lack of sales did. You see its simple economic ( yet another topic you appear to be clueless about) You cannot maintain a for-profit company designing and manufacturing automobiles that no one wants to buy.. its that simple..
    1
  888. Rotming One of the biggest barriers to making a profitable Wankel powered automobile is not emission at all... its fuel economy.. And the Wankel simply has horrible fuel efficiency... it always has and it always will.. because it is less efficient in converting fuel into heat energy and its also much less efficient in converting heat into work... its so bad that no engine manufacturer uses the design anymore
    1
  889. Rotming Its a commercial failure because every company that invested money into the development of the Wankel no longer produces them...
    1
  890. Rotming You sir are the one that really needs to read a book and stop spreading your particularly foolish form of ignorance across the internet...
    1
  891. Rotming Please, don't try to make another feeble attempt to educate me about batteries or any other subject that you clearly know absolutely nothing about. Its well understood fact in the field of engineering that batteries cannot and will not match the efficiency or practicality of ICEs...
    1
  892. Rotming Why should we go back to the 1800's and ignore the knowledge acquired over the last 200 years though science, engineering and practical experience.. Just because you are complete ignorant of this wealth of accumulated knowledge does not mean we should give any weight to your fantasies or speculations about technology that is already well documented and understood.. WHY? Why would anyone want to take your foolish advice and go back and make all these mistakes and discoveries all over again???? Would that not be a complete and total waste of the educational and research institutions that were founded to bring us into the modern age we live in today? and not walking around barefoot and living in caves???
    1
  893. Rotming Yes you have! You have insulted my intelligence and that of every other human being that has the misfortune of reading your ignorant comments on a topic that you are not qualified to comment intelligently about.. Please stop spreading your ignorance and go educate yourself.. you will not just be benefiting yourself but the whole community will be a better place too..
    1
  894. Rotming There are NO modern day Hemi engines
    1
  895. Rotming Then why would a manufacture chose to invest millions of dollars in developing an engine design that is already understood to be the least efficient design or design concept??? Don't you see there is no logic to what you just wrote?
    1
  896. Rotming No, there is no option when what you are proposing is not possible, because it violates the Laws of Thermodynamics
    1
  897. Rotming Do you know what the Carnot Cycle is??? No of course you don't... otherwise you would not be making such nonsensical comments on a topic you know nothing about
    1
  898. Rotming That is called 'faith' not science.. what you 'chose" to believe is true is not a garantee that something is true or real.. you can imagine something but can you prove it...??? its pointless to argue a topic that you do not understand.
    1
  899. Rotming You certain would not invest millions of your own dollars its a research program to turn Lead into Gold now would you?
    1
  900. Rotming So why isn't anyone turning Lead into Gold??? I'm starting to think you believe ANYTHING!!! like the Moon is made out of cheese and the Earth is flat as well LOL...
    1
  901. Exciting news? We are talking about the TRUTH
    1
  902. You seem to have a problem understanding the difference between RUMORS and FACTS... I hope the NEWS clarifies this.
    1
  903. +Rotming I see you already deleted your embarrassing RX-9 comments.
    1
  904. +Rotming They were there last night... where did they go?
    1
  905. +Rotming I can understand that you would be embarrassed about them, I know you hate it when I correct your mistakes.... but you don't need to lie about it.
    1
  906. 3.9 liter actually.. so yeah, its pretty bad.
    1
  907. Having a car that doesn't start is no fun... neither is replacing the engine..
    1
  908. Alex Wu I like to restore old cars, so yes rebuilding the engines can be fun, but for the average car owner it seems to be more of a horrible tragedy when you need a new engine... especially when it only has 60k miles or your still making payments on the car.  No auto manufacture builds or sells Wankel powered cars anymore.. so it is now becoming a less likely scenario.
    1
  909. Actually its a 3.9 liter but when you compare it to a 4-stroke Otto engine its closer to a very inefficient 2.6 liter for comparison sake.
    1
  910. Nah I'm still here... and you still look like a fool
    1
  911. Your angry, ignorant troll comments still pollute the internet.. Because everyone knows that Wankel engines are obsolete and Mazda CEO confirmed they are not coming back.
    1
  912. OBSOLETE Mazda was the very last company that offered the Wankel in regular production but due to dismal sales Mazda was forced to abandon the outdated technology years ago.
    1
  913. The very last production Wankel engine left the Mazda Ujina #2 Wankel engine assembly plant and the plant was shut down on June 22nd, 2012 at 4:30pm. The plant has been since demolished and replaced with a brand new SKYACTIV engine assembly plant manufacturing reciprocating engines.
    1
  914. You are certainly not going to argue that steam locomotives are not obsolete? Are you??
    1
  915. I understand you are a little slow.. but will make my point perfectly clear even for you... you in fact just proved that the Wankel is obsolete.
    1
  916. Just answer the question... are steam locomotives obsolete?
    1
  917. Then explain why reciprocating engines are still manufactured and Wankel are not? If they have "obvious" advantages? They why are they so obviously abandoned by manufacturers?
    1
  918. Are steam locomotives obsolete?
    1
  919. Stop avoiding the simple question.
    1
  920. +ey b0ss "Were".. too bad they never mass produced them for cars either..
    1
  921. ey b0ss Nah, its just a concept car...   the Wankel is dead 
    1
  922. Jeremy is right... the 8 is a SHED!
    1
  923. The Rx-8 is simply FUGLY
    1
  924. Wankel engine R.I.P. 1964 - 2012 "Rust in Peace"
    1
  925. @Tom No, its not even ugly... its Fugly! Fuckin Ugly!
    1
  926. Its 2017!!! WHERE IS IT???? Fake Clickbait Video
    1
  927. RX-8... an ugly shed.
    1
  928. @Jaggler_ Just the facts here son, Mazda discontinued the RX because no one bought them....
    1
  929. @Jaggler_ And for the poor fools that did... this is what they experienced. https://www.youtube.com/watch?v=JM0JaJ5GXik&t=96s
    1
  930. @Jaggler_ And for the poor fools that did... this is what they experienced. https://www.youtube.com/watch?v=JM0JaJ5GXik&t=96s
    1
  931. 18tangles We all know the Packard version was better... quality control and interchangabilty of components was much improved over R-R production... The Bendix-Stromberg was in use in the states by 1936!!!  way before the brits bought them up... 
    1
  932. You certainly won't to have to worry about premature engine failures with Honda or the Nissan
    1
  933. +PRE CBS STRATOCASTER'S HEMI ® in all caps is a register trademark, its been used before on other engines that were not equipped with hemispherical chambers like current design.
    1
  934. +101jir But you can fairly compare Rolls-Royce's outdated and fatally flawed float valve carburetor to other aircraft that did not exhibit any of these problems.
    1
  935. +David Edbrooke The Spitfires stalling R-R Merlin engine was a serious flaw that did not effect the Packard V-1650 or the Allison V-1710... The Allison powered P-38 was a plane that at the time of its introduction not only outperformed the flawed Spitfire... but with its superior fuel delivery system offered a cure to this fatal flaw...
    1
  936. ne0tas Apex seal failure is the primary cause of premature engine failure in the Wankel KKM design... all Wankel  engines suffer from this design defect and is one of the main factors in the design becoming completely obsolete by 2012
    1
  937. LightningAssault.com Just google it, its easy to find an image that shows the flat top pistons.. Chrysler stopped production of hemispherical V-8 engines in 1971..
    1
  938. +otterspocket2 Its very clear from this example that overall performance was superior utilizing Direct Fuel Injection.. a technology the the brits simply didn't have yet.
    1
  939. +Tiger Moth That's good for a laugh!Hahaha! As I've pointed out before... you are no expert on WW2 aircraft engines... particularly fighter planes.
    1
  940. +Tiger Moth Then explain why there were not one but 2 technical efforts to correct the fatal defect caused by the outdated SU float valve carb???? If it wasn't an issue? Why go to such tremendous effort to correct the fatal flaw.
    1
  941. +Tiger Moth Yes, and I have had to correct many of your egregious and rather embarrassing mistakes.. In particular the difference between manifold "boost" and Water/Methanol Injection and the difference between 'WEP' War Emergency Power and MIL Power (P-100) aka Max. Continuous Power Rating.. Two very important fundamental concepts you were hopelessly confused about until a corrected you.
    1
  942. +Tiger Moth Explain why there was a concerted effort to remedy this flaw that was not shared with Luftwaffe or American aircraft???
    1
  943. +Andrew Fishburn Please cite an example? The video's topic is in fact the R-R Merlin's fatal flaw.. so that is the topic of discussion here.
    1
  944. +otterspocket2 You are referring to the temporary "fix" to correct only the flooding problem that could indeed cause the engine to stall completely.. a fatal flaw even in non-combat operations.. The American Bendix pressure-feed carb solved both issues related to the outdated SU design which suffered both loss of power AND stalling due to flooding.. Direct Fuel Injection was immune to these flaws and had several other significant advantages such as increased power output (carbs work by restricting airflow) and resistance to icing and detonation... It is why the Luftwaffe continued to use fuel injection throughout the war and was later adopted by BOTH USAAF and RAF late in the war.. of course the introduction of the jet engine halted further Allied development after the war.. propeller driven fighters were rendered obsolete by this time..
    1
  945. +Andrew Fishburn No, wrong answer... Cite an example of a brit fighter plane equipped with direct fuel Injection prior to the introduction of the Daimler-Benz 601, BMW 801 or Jumo 211 in the early to mid 1930's????? Direct injection was invented by Rudolf Diesel in 1892
    1
  946. +Andrew Fishburn Then cite an example of a brit fighter with Direct Fuel Injection prior to the RLMs adoption in 1935???
    1
  947. +Tiger Moth Just the facts..
    1
  948. +otterspocket2 We are trying to achieve a fighter aircraft design that does not stall..and does not lose power when engaging or being engaged by an enemy fighter. A problem not suffered by pilots flying American or German produced fighters at this stage of the war..
    1
  949. +Andrew Fishburn and what has been repeated over and over again is that the Spitfire and the Hurricane were both equipped with fatally flawed SU carb, and suffered the exact same fatal performance deficiencies..
    1
  950. +Tiger Moth Sorry Tiger Moth, The Bendix PD carb was an AMERICAN design. First delivered to the brits in shipment of American made aircraft with Allison V-1710 engines and later Packard V-1650 installed on britsh aircraft.
    1
  951. +Andrew Fishburn No you are dodging the subject.. by the way, the type of internal combustion engines used by the RAF during WW2 were invented in Germany by Nikolaus Otto and Carl Eugen Langen
    1
  952. +Tiger Moth The brit were still using steam engines when Germany developed the first practical internal combustion engines which were patented and sold under license around the world... including in the UK.
    1
  953. +Andrew Fishburn it certainly is.. if the brits had fuel injection technology at the time the Merlin wouldn't have had the fatal stalling problem which is the topic of this video...
    1
  954. +Andrew Fishburn Not at all... you have simply exhausted the resources of your limited knowledge on this topic
    1
  955. +Tiger Moth The Stromberg-Bendix PD carb was developed in 1934.. long before the Merlin 66 existed
    1
  956. +Tiger Moth Owing to the fact that you have absolutely no formal education regarding aircraft engine design and operation.. you are completely oblivious to the fact that engines equipped with Direct Fuel Injection ARE NOT EFFECTED by detonation caused by excessive inlet manifold temperatures... So Yes, you look like a batty old fool now.
    1
  957. +Andrew Fishburn Don't cry about it now, you were bested fairly and soundly.
    1
  958. +Tiger Moth You really are like a Tiger Moth among Spitfires! Lol!! You have just proven you have no clue what Direct Fuel Injection is.. Direct injection uses injectors mounted DIRECTLY INTO THE COMBUSTION CHAMBER No fuel is introduced into the combustion chamber until the piston reaches the top of the compression stroke and IGNITION occurs..
    1
  959. +Andrew Fishburn I simply called you out on an egregious and foolish claim you made... and then you completely failed to back it up.. you folded.
    1
  960. +otterspocket2 Rolls Royce did not have Direct Fuel Injection technology... or a pressure feed carb. in 1940.. THAT WAS THE POINT! The Stromberg-Bendix PD carb is an AMERICAN design... not british.
    1
  961. +Andrew Fishburn Then just cite an example of a WW2 brit fighter equipped with Direct Fuel Injection before 1935?
    1
  962. +Andrew Fishburn LOL!!! You want me to prove that something didn't exist?? Something I just asked to prove it did! I'm starting to think I'm dealing with a child, certainly not a mature adult.
    1
  963. +Tiger Moth You just said they did? But didn't even know what DFI was... Why should we believe you?
    1
  964. +Tiger Moth Introducing the fuel into the impeller is not fuel injection.. That is Draw-through-Supercharger Carburetion.
    1
  965. +otterspocket2 So you are seriously suggesting Rolls-Royce INTENTIONALLY WANTED their Merlin engines to stall and lose power in high G maneuvers???
    1
  966. +otterspocket2 You absolutely correct about that! They do not work the same! No ones risking death, serious injury or invasion from another country if your smart phone design has a flaw...
    1
  967. +otterspocket2 A compromise? Perhaps.. or as is clearly the case a better solution simply wasn't available in the british aero industry.. Even if we were to accept your theory? In any case in hindsight it was certainly a mistake that cost lives and limited the aircraft's maneuverability until a permanent solution involving the adoption of an American fuel delivery system is what finally cured BOTH the fatal flaws. American and German aircraft were immune to this fatal flaw as they clearly saw the importance of maintaining proper fuel metering under all high 'G' maneuvers that R-R did not.
    1
  968. +Andrew Fishburn Well explain why German, American even Russian manufacturers adopted pressure feed fuel systems and Rolls-Royce continued to use an outdated automotive carburetor..?
    1
  969. +Tiger Moth You're clearly out of your depth here.. especially if you cannot grasp such fundamental fuel system concepts.
    1
  970. +Andrew Fishburn I said, cite an example that they did? which you clearly failed to produce. I can only guess you have never flown? Certainly a sudden, unplanned and unpowered landing (possibly over enemy territory or over the sea) IS NOT a minor flaw!!!
    1
  971. +Tiger Moth It wouldn't called a fatal flaw it no one ever crashed..
    1
  972. +Tiger Moth If it was a minor problem? why not just one, but TWO attempts to fix it?
    1
  973. +Andrew Fishburn We are not talking about whether they knew it existed.. the question was did they have access to practical, reliable, production quality fuel injection or pressure-feed carbs.. which clearly they did not. You kids are suggesting that it was something simple as downloading an app on your smart phone..
    1
  974. +Andrew Fishburn Now your just taking a piss! Are you suggesting that Spitfires were never shot down by a Me-109s, Fw-190's or other aircraft? Now if the Spitefire was so fast it couldn't be shot down? Now that would be a MASSIVE ADVANTAGE.
    1
  975. +Tiger Moth Why don't tell a fighter pilot that a momentary or total loss of power during a dogfight is not a fatal problem? I guarantee the response you'll get is swift kick in your fat arse you batty old fool.
    1
  976. +Andrew Fishburn Well if you insist they did PLEASE CITE AN EXAMPLE?
    1
  977. +Tiger Moth The RAF certainly lost many planes... some either directly or in part to the Merlin fatal flaw... many were lost to unrelated circumstances.
    1
  978. +Andrew Fishburn Tell us who you think did invent direct injection?
    1
  979. +Andrew Fishburn How old are son? That is a site for children struggling with their primary school homework..
    1
  980. +Tiger Moth Why don't you request the MoD for that information?
    1
  981. +Andrew Fishburn Where is your proof?
    1
  982. +Andrew Fishburn Google is not an brit invention either...
    1
  983. +Andrew Fishburn You should know this kid..Google was created by American Larry Page in Menlo Park, California
    1
  984. +otterspocket2 How would you like a ride in a single engine airplane that sometimes the engine stalls completely without warning.. and never mind someone is trying to shoot down the whole time...
    1
  985. +Andrew Fishburn That's easy... a Me-262
    1
  986. +otterspocket2 It was not to developed to fail to run properly or fail completely during a dogfight... which is why it has be accurately called a Fatal Flaw..
    1
  987. +otterspocket2 How many kills did you score with your lawn mower powered glider??? OH! that's right... you don't even need a pilots licence to fly a shed like that... LOL!!!
    1
  988. +Andrew Fishburn With a 100+ mph speed advantage over any Allied fighter it indeed had a MAJOR ADVANTAGE over any aircraft that saw combat service during WW2
    1
  989. +otterspocket2 The plain truth is that Rolls-Royce lagged years behind in fuel system technology... get over it.
    1
  990. +Andrew Fishburn yet they had one of highest kill ratios of WW2.. Not in a dogfight with a proper pilot at the controls.. Not during the war, postwar versions were faster but never matched the Me-262, the "meatbox" had enough trouble staying in the air.. it was a failure as a fighter.
    1
  991. +Andrew Fishburn The Merlin's fatal flaw was due to an outdated and obsolete carburetor design... not because of fuel quality or quantity... Have you lost the plot again?
    1
  992. +Andrew Fishburn The Meatbox was the worst fighter aircraft ever produced..
    1
  993. +Andrew Fishburn German engines didn't stall in a dive... only british ones.
    1
  994. +otterspocket2 I prefer to leave the lawn mower engines in the garden shed.. and rely on proper aircraft engines to keep me in the air.. much higher and faster than your primitive contraption..
    1
  995. +Andrew Fishburn If their purpose was not to stall in a dive... the Merlin was the only engine not fit for the job...
    1
  996. +Andrew Fishburn That Rolls Royce didn't have access to Fuel Injection technology... a point you failed miserably to disprove.
    1
  997. +Andrew Fishburn No, You made the claim they did... Or have you forgotten already? Then cite an example? Cite an example of a Rolls-Royce engine in this era with a practical, production quality fuel injection system?
    1
  998. +Andrew Fishburn You wrote this comment 14 hours ago quote; " Britain definitely had fuel injection technology even before the Spitfire." You have been dodging this foolish mistake ever since...
    1
  999. +Andrew Fishburn I stand by my comments as 100% factual and true.. Rolls Royce didn't have a fuel injection system developed for the Merlin or any other engine prior to 1935.. or 1939.
    1
  1000. +Andrew Fishburn That is exactly what I claimed and its 100% true...
    1
  1001. +Andrew Fishburn Thats easy! Rolls Royce never had a fuel injected Merlin engine..
    1
  1002. +Andrew Fishburn Name a Rolls Royce engine that was fuel injected in the 1930's? There are none! Widely available everywhere except at Rolls Royce!
    1
  1003. +Andrew Fishburn Yes, because they didn't.. and you failed to provide any evidence they did.
    1
  1004. +Andrew Fishburn Correct, I didn't offer any proof to support your theory... and neither did you, because there isn't any. What other Brit engine manufacturer provided engines for the Spitfire in the 1930's???
    1
  1005. +Andrew Fishburn Without any doubt Rolls Royce knew that fuel injection systems for aircraft existed... they just didn't know how to build one of their own. They didn't have a choice, it was not a technology they had developed or had access to buy.
    1
  1006. +otterspocket2 Are you implying Rolls-Royce was not BRITISH!!!!! Rolls-Royce was 100% british... at least until the company went completely bankrupt in 1971..
    1
  1007. +otterspocket2 Just the facts here.. something you seem to be completely unfamiliar with.
    1
  1008. Not during WW2
    1
  1009. +John Burns Then explain why brits all drive German cars and all the brits car companies are owned by India????
    1
  1010. +John Burns Where ia that new Mazda RX-7 you promised was coming out this year??? Its 2017 and I can't find them for sale anywhere???? Why is everything you say turn out not to be true?
    1
  1011. +KeyToTime I think you are naively speculating here, anyone familiar with both Carburetors and Fuel Injection knows very well that mechanical Fuel Injection is extremely reliable much more reliable than carbs.. the added cost is more than off-set by the many performance advantages... FI produces more power, improves fuel economy(thus improving range) is less prone to icing problems and in the case of the German's GDI system allowed high boost pressures without need or the negative effects of high octane leaded fuels... and of course, most importantly completely immune to flooding and stalling in high 'G' maneuvers. Carbs tend to run too lean at WEP... leading to detonation during WEP, the Rolls-Royce Merlin suffered rather badly from this design defect and so full power had to be limited to 5 minutes per flight and only used if absolutely necessary...otherwise the engine would usually self-destruct in flight resulting in a crash, if WEP was used during a flight the aircraft would be grounded upon return until completion of an internal inspection for damage and to replace the spark plugs which would always be damaged and no longer serviceable. Engines equipped with GDI typically did not suffer from these service and maintenance problems that cause problems with combat readiness.
    1
  1012. +KeyToTime The point of the video is that IT DIDN'T WORK
    1
  1013. +silver fox Then why the two separate attempts to correct this fatal flaw in its design???? Rolls-Royce did not develop a successful multi-point injection system for the Merlin until the design was already obsolete circa 1946
    1
  1014. +silver fox All Spitfire models fitted with Merlin engines were equipped with breakable metal "tattle-tale" locks on the throttle lever stop, a pilot would have to forcibly break the metal strip to advance the lever into the boost regulator override position. Ground crews checked and replaced this locking device before every flight, failure to report the use of WEP in flight was a serious offense... pilot were required to give a detailed explanation of why he deliberately over-rode the boost regulator and risking damage to aircraft.
    1
  1015. +silver fox Well as your knowledge is proving very limited that is not surprising...
    1
  1016. +silver fox Next you will attempt to deny that the Me-109 was not the most successful fighter aircraft design in history...
    1
  1017. +silver fox Higher manifold pressures and poor mixture control is what caused the detonation problem during WEP.. The German GDI system reduces the need for high octane by reducing detonation... it also increases power output over carbs
    1
  1018. +silver fox Then why was Rolls-Royce still using gravity float valve carbs???? American manufactures and many other countries had already abandoned them in favor of pressurized fuel deliver???? The reasons for this seem very obvious both then as it is now... its surprising how you can refuse to acknowledge this glaringly obvious fact.
    1
  1019. The American Stromberg-Bendix PD Carb... was not fuel injection, but it did away with the outdated and troublesome float valve found in the SU carb used by Rolls-Royce
    1
  1020. Ömer ULUS All cars have such a feature... its not uniqe to the RX..what is unique to the RX cars is flooding when attempting a hot restart...
    1
  1021. American Bendix Carb off the Packard Merlin solved the problem.. the Germans used GDI.. never had these problems
    1
  1022. But the German planes didn't stall like the brits... that was the whole point
    1
  1023. +101jir Well, you would be very confused and misinformed then.. the Daimler-Benz DB-601/605 and Jumo-210 engines all used GDI. Yes, it was.. at the introduction of the air war the brits were still using outdated float valve carburetors. There should be no confusion between an engine stall and aerodynamic stall (flow separation of a lift generating device).. and you left out "compressor stall".. another aeronautical disambiguation of the term "stall".
    1
  1024. +101jir Were you watching a different video? Because this one was not about "'aerodynamic stall" or "compressor stall" I'm pretty sure the Merlin was not a jet engine... Lol.
    1
  1025. +101jir After reading your previous comments , the potential for you to be confused certainly is significant.
    1
  1026. +101jir Maybe you should actually watch the video before commenting? and spend more time reading a book or attending aeronautics school too?
    1
  1027. +101jir Because reciprocating engines do not experience "compressor stall" that is a type of stall reserved for jet engines.
    1
  1028. +101jir That's exactly why I corrected your numerous errors.. there is no need for you to go around confusing people with your misinformation.
    1
  1029. +101jir True, you seem to know very little on this topic and have provided nothing relevant worth continuing.
    1
  1030. The Merlin was not equipped with fuel injection during the war.. The only modification that solved Both the Merlin's fatal fuel system flaws was the installation of the American designed Bendix-Stromberg PD-18 pressure feed, float-less CARBURETOR
    1
  1031. Turbine is a FRENCH word.. its correctly pronounced Tur-bean
    1
  1032. +Maunster! YOU ARE WRONG!
    1
  1033. tyler white Oh youre very very confused... where did you get that load of crap? wikipedia? It can't be pistonless? its got pistons... in fact the word  "piston" is right in the NAME!!!!  Well youre at least on the right track there, yes in the case of Mazda's version of the KKM there is only 16mm of crankshaft stroke... but more importantly you missed the fact that there is not mechanical leverage either... the force is indirectly impinged through the piston and fixed gear and not direct to the offset lobe of the eccentric-crankshaft  The crank is not "submerged".. Yes you are wrong... very wrong.
    1
  1034. Giovanni Toro Thank you sir,  Its a very interesting story how the Wankel engine evolved and the crazy twisted history of its name and its inventors..The fact that so many people refer to a manufactures "Brand name" as an engineering classification of the engines "type"  can only be attributed to the power of modern corporate advertising.. (and the complete lack of engineering skills of the average consumer)It makes it all the more ironic when that brand name is now defunct!Cheers my friend!
    1
  1035. DankinDolphin  Yup, Thats right, the Wankel KKM is not a Rotary... It has a non-rotary layout... Don't get confused with the DKM... that design was abandoned and never used.
    1
  1036. DankinDolphin Please... don't take me for some fool that thinks Rotary engines and Wankel engines are the same, they are not. You didn't even know there was 2 types of Wankel engines... and you still don't understand the difference between the engineering concept that makes them differ...  One is Rotary, the other isn't One was invented by Felix Millet... the other by Felix Wankel... The engine we all know as the "Wankel"  was not designed by either man.. and is not a Rotary engine, it was designed by Dr. Hanns Paschke.
    1
  1037. ***** Just the facts here son... no BS.  Maybe someday if you work really hard, graduate high school, you can get the chance to go to college and learn something about engineering automobiles and engines.... It doesn't matter how "good" you take care of your RX-8, your engine still has a staggering premature failure rate... the engine design has had so many failures that NTHSA was forced to issue an order for Mazda to recall 10s of thousands of RX-8 engines in the US for manufactured defects and premature engine failure... Sorry you don't understand the difference between brand names and technical classifications...  the now defunct "Mazda Rotary®" brand is no longer sold... it also ironicallly not a rotary type engine... Dr. Felix Wankel only built one Rotary type engine and I can assure you its not the one in the RX-8. perhaps if you took some time to learn something about the history of the design you would not look like such an embecile... Cheers!
    1
  1038. Justin Reed There are are 2 pistons..orbiting pistons... that's why the word PISTON is right in the NAME the engineer gave the design...   If it has a spinning shaft then it can't be a rotary... rotary type ICEs don't have have a spinning shaft... they can't. Talk about ignorant... you probably don't know who designed the Wankel KKM engine Why don't you take 5 minutes to learn something about the difference between the Rotary and the Wankel..?  
    1
  1039. c0zened Yup, that is correct.. its surprising the amount of ignorance and confusion that surrounds both designs.. its remarkable how many people don't have enough knowledge to know or understand the difference between the 2 very different types.. Dr Wankel didn't invent the Rotary... and the Wankel engine that we are all familiar with was not designed by Wankel himself.. If you have any questions I would be happy to explain.. Cheers! 
    1
  1040. Justin Reed I disagree, Yes they are... and I can prove it,, Who invented the Rotary type engine?
    1
  1041. c0zened It is truly unfortunate that there is so much ignorance on this topic... Some people just don't have enough education to make even a single intelligent comment about Rotary engines... they all sound like a bunch of foolish idiots really
    1
  1042. c0zened Then why do I know the difference between a Rotary and Wankel and you do not??? Are you a grade school drop-out?
    1
  1043. Steve S Its unfortunate that so many people like yourself do not understand the difference between what is a "brand name" and its engineering classification... Dr Wankel did use a Rotary layout for his NSU superchargers and prototype DKM-54... But Dr Hanns Paschke discarded Wankel's rotary layout when he designed the Wankel KKM that we all know today as the "Wankel engine"  Perhaps If you want to comment in such an arrogant way, you could at least try not to be so embarrassingly stupid. 
    1
  1044. c0zened Go back to playing video games kid.. the adults are talking here
    1
  1045. c0zened Come back when you are grown up and learn the difference between a Wankel and a Rotary type engine
    1
  1046. Seramics No, I was just pointing out the fact that many people like yourself don't know what a Rotary engine is or the difference between a Rotary and a Wankel.. like the KKM-57 Because it seems pretty clear you still  think they are the same..
    1
  1047. c0zened Anfänger
    1
  1048. Vale Anthony Sparrow  Lil'Stevie is just a boy still learning his head from his ass, we gotta give'em some more time to get his shit straightened out....  Cars don't get recalled for defective engines because of poor maintenance... especially when your seen failures as early as 30k miles...  The RX-8 was a huge failure for Mazda... they never turned a profit and are still losing money on them...  
    1
  1049. GHOST Its just a brand name you idiot.. The Wankel KKM is an Orbiting Piston Engine Sorry son, no rotors Rotary means the whole engine spins round.. that doesn't happen on the Wankel KKM It has a spinning crankshaft and flywheel. Rotary engines don't have those..  the only rotor found on a Mazda Rotary® would be inside the ignition distributor if it has one...
    1
  1050. Vale Anthony Sparrow Rotate or rotor means something that spins around on a fixed  axis or an axle. The Orbiting Pistons of the Wankel KKM engine move in a Epicyclic system in a distinctively PLANETARY  MOTION Not all pistons move in a reciprocating motion a piston is simply a moving part of a sealed chamber that is used to transfer the energy of expanding gas. It can be any shape  and does not by definition...  move only up and down. Cheers!
    1
  1051. GHOST No, you need to learn something about engineering here son. Rotor means something that spins on an axis... a fixed point. That doesn't happen on the Wankel KKM It does happen on a Wankel DKM, but no one ever built any of those... certainly not Mazda either. Rotary type ICE  DON"T HAVE CRANKSHAFTS OR FLYWHEELS They don't need them.. WHY Because the whole engine is a ROTOR it rotates on a fixed axis.
    1
  1052. c0zened Thats right... And thats why its called a ORBITING piston engine its PISTONS move in a PLANETARY MOTION
    1
  1053. I find it absolutely shocking how little these Mazda fans know about Wankel engines! You would think that someone that was interested in them would know at least something about them??? Yet it seems no one here even knows how they work! or who invented them! sounds like a bunch of clowns to me..    
    1
  1054. c0zened I'm not the one that doesn't know what planetary motion means... maybe you can take some engineering courses when you graduate high school... if you haven't dropped out yet. Not fit? that's funny... because that is what I've been paid to do... 
    1
  1055. What? All these Rotary experts and none of you can tell me who invented the Rotary engine????
    1
  1056. GHOST Well?
    1
  1057. GHOST Sorry, you're wrong again. Wrong Felix, The Rotary internal combustion engine was invented by  Felix Millet in 1892 Not Felix Wankel he wasn't born yet....
    1
  1058. Seramics What do you call someone that's  E-tarded and Rotarded? Seramics
    1
  1059. Seramics Sounds like you are already suffering from permanent brain damage. And you still don't know what a Rotary type engine is...
    1
  1060. Seramics Thank you for proving my point..
    1
  1061. Seramics Childish insults won't make you look smarter than me... and they won't prove your failing argument... The fact is you have no clue what a rotary engine is... You have completely failed to prove otherwise..
    1
  1062. Seramics Oh, so you have learned something finally.. Yes there is a difference between a Wankel KKM engine and a Rotary.. The Wankel is not a Rotary type engine. Perhaps someday you will possess the ability to distinguish a 'brand name' from a engine type too...???
    1
  1063. +Seramics You admitted you were wrong and then delete your comment? Not very mature...
    1
  1064. Seramics Thanks for at least admitting you were wrong... and deleting your comment.. Now we only have to work on your foul mouthed comments..
    1
  1065. Adith Thomas Apparently this topic is way above your skill level?  The Wankel KKM-57 engine is NOT a Rotary... Don't confuse brand names with engine types
    1
  1066. Adith Thomas LOL..!!!!! All Mazda RX cars had Wankel KKM-57 engines.. The Toyo Kogyo Cork Co. bought the Wankel KKM design from NSU in 1961.
    1
  1067. Adith Thomas never left..The truth is not going to be suppressed by ignorance... the truth will always prevail 
    1
  1068. +TwoAyem Are you old enough to drive yet? Grown-ups usually don't refer to a sedan as "eye candy', I hear a lot of thing too.. like, "the day I sold it was the best day of my life."
    1
  1069. The Mazda RX brand is dead.
    1
  1070. +Ethan Hershberger My condolences... are you trying to sell it before the engine blows... don't make a big mistake worse by hanging on to it any longer than you have to... these cars are nearly worthless after the engine dies and repairs can easily exceed the resale values.
    1
  1071. +CaleonVEVO Just the facts here kid... don't be bitter that Mazda dropped the RX like a bad habit.
    1
  1072. @Danuzz Let people hear the truth! The idiots and fools need to be exposed for what they really are... liars and frauds.
    1
  1073. @Danuzz So are you saying you are part of the problem? That you condone the liars and the false rumors they are trying to spread???
    1
  1074. Mazda confirms No New Rotary Range Extender next year. https://thedriven.io/2019/06/11/mazda-confirms-100-electric-car-model-for-2020/
    1
  1075. @Skizzy 1 Mazda doesn't sell Wankel engines anymore.... you are just an angry little troll.
    1
  1076. @Groovy Games That would be a very poor analogy... in fact saying a Wankel engine is a Rotary type engine is like saying Tiger Balm® is made from tigers. Its a very good example of a Brand Name that makes reference to something it does not actually contain. Mazda purchased the rights to sell Wankel KKM-57 engines from NSU Motorenwerkes GmbH. in 1961... after the 10 year licensing agreement expired Mazda came-up with a new brand name "Mazda Rotary®" because when Mazda went bankrupt in the 1970s they could no longer afford to pay royalties to NSU which had been merged with Audi after being acquired by VAG (Volkwagen AG. Grouppe).
    1
  1077. Chuck Sharp Its kinda a moot point really.. seeing as Mazda discontinued both 4 years ago due to dismal sales and ongoing problems with reliability.. Mazda was forced to extend the warranty to meet "industry standards"and recall the engines engines under the NHTSA recall campaign and the infamous buyer survey scandals.. 50,000 miles is about the interval when the notorious problems with the Renesis often start to occur.. Good luck.. you will need it!
    1
  1078. Chuck Sharp Its completely moot chuck... because the design is completely obsolete now.. even General Motors still makes the "Small Block" V-8 but the Wankel is now a relic of an evolutionary dead-end in automotive engineering.
    1
  1079. Elio pushes back production AGAIN now says 2018.. recent SEC filings show its days away from bankruptcy.
    1
  1080. No one tops Queen Victoria..
    1
  1081. enviro-nazis??? should we call them the white shirts??
    1
  1082. Nearly bankrupted Mazda... currently dealing with a class action lawsuit for defective RX8 engines too...
    1
  1083. tyler lewis There were a few recalls on the RX8.. the big one was the engine recall... under government pressure they were forced to do a NHTSA recall for defective engines that were dying at very low mileage...Mazda avoided some heat by extended the core engine warranty on most RX8s up to 100,000 miles but they were also called out by several publications for omitting RX8 owners from customer satisfaction surveys... deliberately trying to down play all the problems but to no avail, sales figures crashed... Mazda only selling very few RX8 the last year it was offered sale.. Now the problems the defective warranty replacement engines continues, spurring a lawsuit in California that may also include RX8 owners in all 50 states in the US.  
    1
  1084. tyler lewis Lol.... thumbs up 
    1
  1085. The AE86 Of Mt. Akina. Well, when the NHTSA gets involved and mandated a recall for defective engines you know damn sure its not a "rare" problem....  
    1
  1086. Wankel engines were 4-cycle.
    1
  1087. From what I've seen they don't like any climate... that's why Mazda stopped making them...
    1
  1088. +Ronald de Rooij they don't sell them anymore
    1
  1089. Ronald de Rooij Not a very good investment... premature engine failure is something this car is notorious for...
    1
  1090. Ronald de Rooij No worries then, good luck Cheers!
    1
  1091. Sir Epiceiden Yes, they run very smooth if the compression loss effects all the seals.. The Wankel can indeed limp along with damaged seals for a long time... albeit with greatly reduced power and efficiency. Rubbish, nothing but more old wives tales.. these engines fail prematurely even with recommended service and good driving habits.. The simple truth is they just do not last very long and it is for this reason they are no longer manufactured or sold... obsolete. 
    1
  1092. chinchy111 It has a Wankel engine... thats the problem..
    1
  1093. chrischoy9  Have you seen the new 2015 Harley-Davidson ENGINEcycles...??? of course not... they call 'em MOTORcycles 
    1
  1094. Chad Bremer Low compression motors that flood on restart don't count... 
    1
  1095. Chad Bremer Oh really? 
    1
  1096. UniversalStrayins You don't really expect anyone to believe you?   
    1
  1097. chinchy111 Thats just a myth really... there is nothing you can do to stop  the seals in the Wankel engine from failing
    1
  1098. DystopicEdits The majority of RX-8 had there engines replaced  under warranty or during the engine recall at around 50-60k miles 
    1
  1099. YoungGunzProductions When was the last time you had a compression test... running strong??? How do you know???  
    1
  1100. Jean Fernández Whats the compression??? You bought the car new and owned it its entire life?? You know for sure its the original... motor? You realize what you are claiming and everyone else seems to be claiming something that is statistical impossible... Mazda replaced thousands of Renensis engines under warranty and during the NHTSA defective engine recall campaign.. most of these engines never survived to 60k much less 120k
    1
  1101. peter parker You have to change the engine in your Nissan every 100,000km????? what model is it? 
    1
  1102. The NHTSA recall investigation proved conclusively that the RX-8 suffered premature failures regardless of how well they were cared for... dispelling the false urban myth forever, Mazda was compelled by the mountain of evidence to voluntarily recall the engines and reimburse owners.
    1
  1103. @Riccardo Spanano The truth bears repeating Just the facts... just the facts. I guess you are not accustomed to hear the truth then, are you?
    1
  1104. @Riccardo Spanano The truth always prevails...
    1
  1105. @Riccardo Spanano The truth will only make you cringe if you are living in deep state of total denial...
    1
  1106. @Riccardo Spanano Drug abuse might explain your delusional, anti-social behavior son... but it does not excuse it.
    1
  1107. @Riccardo Spanano Run along little troll boy...
    1
  1108. @Just A P39N Perhaps you should go troll elsewhere kid... you are ineffectual in this regard.
    1
  1109. @Just A P39N What do a pot and a kettle have in common with a Wankel engine.
    1
  1110. @Just A P39N NOTHING which proves you are a troll.
    1
  1111. @Just A P39N Why would you? A troll spends his time making OFF TOPIC Ad hominems.
    1
  1112. @Just A P39N Do you really not know what people like you are called???
    1
  1113. @Just A P39N You need to find a new hobby kid... your attempts at trolling are completely ineffectual.
    1
  1114. @Just A P39N You are a troll alright... a pathetic, ineffectual troll but a troll nonetheless.
    1
  1115. @Just A P39N We are talking about automobiles here troll boy...thanks for proving my point yet again.
    1
  1116. @Just A P39N Hey, I just realized this week marks the 10 year anniversary of Mazda's decision to discontinue the RX for good. Cheers!
    1
  1117. The RX8 engines are horrible.
    1
  1118. Its good to see that Germany has finally developed a fast response to suppress dangerous, radical religious sects like the Nazism and Environmentalism that could lead to the breakdown of democracy and threaten the lives of innocent people through fear and propaganda.
    1
  1119. +231mac its a registered trademark, they can sell lawnmower engines with HEMI® slapped on it... the own the name
    1
  1120. Rahul Namboodiri No, they didn't... It does not exist.. do you not understand what the word "concept" means? I guess you haven't heard of patent "phishing" either No, its dead
    1
  1121. Rotming Excuse me sir, can you please direct me to the nearest new car dealer where I might purchase a 2016 model with a Wankel engine????
    1
  1122. Rotming Yeah that rumor has been going around a lot lately... the problem is there is still no more Wankel engines being sold, so I guess the rumors are not true...
    1
  1123. Rotming Then they are in fact obsolete as I have already stated... since you have failed to prove otherwise...
    1
  1124. Rotming The last manufacturer (mazda) ended production years ago... making the Wankel OBSOLETE
    1
  1125. Rotming MY POINT IS WANKEL ENGINES ARE OBSOLETE JUST LIKE T-HEAD (FLAT HEAD) ENGINES ARE!!!!! DUH!!!!!
    1
  1126. Rotming And they are not ever going to bring back Model Ts.... just like they are never going to bring back the Wankel because its obsolete now...
    1
  1127. Rotming They won't be making Model T's ever again because its Flat-head type engine like the Wankel is now obsolete...
    1
  1128. Rotming Thats right, Mazda has upgraded its new models with the modern reciprocating Skyactiv-G technology engines
    1
  1129. NO, they HAVE NOT CONFIRMED production or that the design EVEN EXISTS!!!! Your last comment is unsupported and based on rumors and speculation. NOT TRUE, I did not delete any comments. Interesting theory but the president of Volkswagen has never come forward and said the company will no longer manufacture V-12 engines.. nor has it order development ceased and torn down the factor that produced them... PURE BULLSHIT that is what your story is...
    1
  1130. Stop being stupid...
    1
  1131. Rotming Nor is it any sort of evidence that it exists because there is no evidence it exists.. just your rumors
    1
  1132. Rotming No, they refiled an old patent which was found to be at risk of a "patent Phishing" lawsuit... its something you might be aware of if you had any experience or knowledge of what going on in the automotive industry
    1
  1133. Rotming The Wankel is an obsolete design no long capable of competing against the superior reciprocating technology which is being manufactured today.. the Wankel is dead.
    1
  1134. Rotming I have, its an old patent.. inverting the layout is nothing new.. its been used in the aircraft industry for over 100 years
    1
  1135. Rotming It can't compete... it was tried already and it failed, the reasons why it failed are now well understood by everyone (except perhaps by you)
    1
  1136. Rotming I know exactly why the 1.3 Ecoboost engine was developed.. its unfortunate that you still do not understand the basic fundamental engineering and thermodynamic that created such an efficient design.. or why the Wankel cannot achieve this level of efficiency
    1
  1137. Rotming WRONG, the Wankel no longer offers a significant advantage in volume or or power density.. its power-per-displacement is now well below current standards, The Wankel has proven to be more expensive to manufacture, the Wankel does not offer "ZERO" vibration.. if it did it would not require balance weights, harmonic dampers or a big heavy flywheel to dampen internal vibrations. The Wankel was a commercial failure.. plain and simple.
    1
  1138. Rotming SOURCE PLEASE? There are currently no series mass production of the Wankel engine anywhere in the world.. PLEASE STOP SPREADING LIES AND RUMORS
    1
  1139. Rotming Your cassette tape and vinyl record analogy is certainly a failure... Vinyl records completely replace all previous forms of consumer recording media at the time.. such as wax or metal drums and discs, a huge commercial success... cassette tapes certain replaced a major market share eventually out-selling vinyl records... but vinyl hung on until Compact Disc replaced both mediums rendering them obsolete from mass production, new releases and the mainstream market place.
    1
  1140. Rotming No, its your fault for expecting wiki to be accurate...
    1
  1141. Rotming WRONG, the Mazda Renesis engine for example has over 235 moving and seal related parts alone.. There is one thing you do seem to be good at... repeating old wives tales and rumors. The number of precision parts, materials and construction methods in fact make the Wankel more expensive to produce...,
    1
  1142. Rotming The Wankel is ALREADY ABANDONED... for reasons that you still do not understand...
    1
  1143. Rotming Today, No... because no one makes the Wankel anymore... there is no current example to use for an accurate cost analysis. But in the past the production cost were determined by 26 engine manufacturers and all stated that the design was more expensive to produce and did not offer any economic benefits.. just as it did not provide any other significant benefits or advantages... thus the reason why it could not successfully compete in the commercial market place for any applications traditionally using ICE technology..
    1
  1144. Rotming That is not new production... that is restoring old outdated engines.. just like any other obsolete engine technology found in museums and private collections.. There are dozens of companies that will rebuild, refurbish and restore old obsolete engines such as steam cars and locomotives.. But this does not prove that these old abandoned technologies are not obsolete.. just preserved for historical value.. not commercial viability..
    1
  1145. Rotming But not new production.. because Mazda shut down its Wankel engine production lines 4 years ago.. the facility that made them was also demolished to make way for a brand new Skyactiv-G reciprocating engine plant.
    1
  1146. Rotming Mazda is no longer a manufacturer of Wankel engines.
    1
  1147. Rotming Why should I believe you..? you are the one making wildly false, completely baseless claims! You have never provided any factual evidence that they were ever cheaper to manufacture.. and you won't.. because it is simply not true...
    1
  1148. Rotming The bottom line is the Wankel is ALREADY DEAD.. Dead and gone. WRONG, Mazda has not confirmed it will resume production.. on the contrary the president has stated publicly on several occasions the Wankel will not be coming back... and actions speak loader than rumors dear boy.
    1
  1149. Rotming No, the rest of the mainstream engine manufacturing industry abandoned the Wankel 30 years ago.. long before Mazda did..
    1
  1150. Rotming Tesla is struggling in a very small niche market as Mazda once did with the Wankel engine.. EV's are no where near to becoming a serious threat to ICE powered designs.. thus far sales of EVs have fallen well short of many speculators previous predictions...
    1
  1151. Rotming The Wankel is dead, just learn to accept it if you are still incapable of understanding why..
    1
  1152. Rotming EVs use more energy and create more damaging effects on the environment..
    1
  1153. Rotming Actually No, EVs produce more pollution overall.. they just pollute differently and far away from their point of use.
    1
  1154. Rotming Mazda does not manufacture Wankel engines anymore.. they stopped 4 years ago
    1
  1155. Rotming Don't you see the absurdity of your logic??? Mazda stopped selling Wankel engines because PEOPLE STOPPED BUYING THEM
    1
  1156. Rotming You don't get it do you... Mazda abandoned the Wankel because there is no market share... people simply stopped buying Wankel engines
    1
  1157. Rotming WRONG. Stop spreading lies and rumors. The Wankel has not been banned in sports car racing... Mazda abandoned its Wankel engine racing program
    1
  1158. Rotming WRONG the Wankel engine offers LESS power per liter of displacement...and uses more fuel.. that's why it was unsuccessful in racing.
    1
  1159. Rotming The Wankel is obsolete now.. and people don't buy records any more... they download music from the internet
    1
  1160. Rotming Its not my opinion.. its a matter of fact, the Wankel is dead... and it died because its simply was not good enough to compete with the superior reciprocating ICE design still successfully in production..
    1
  1161. Rotming That is exacting what you have attempted to do... continue to spread rumors and lies.
    1
  1162. Rotming The Wankel is obsolete, it is absolutely 100% no longer manufactured in series mass production anywhere in the world today. The last manufacture in the world (Mazda) ceased production and development over 4 years ago. This is a fact that you can no longer attempt to dispute.
    1
  1163. ***** Your more than a little confused son.. You don't appear to have a clue what your talking about.. Then your reading comprehension is severely lacking or you don't understand the difference between a fact and a rumor.. a legitimate source and a questionable one..
    1
  1164. ***** Mazda board voted in April 2009 to end all development and production of Wankel type engines... All of the R&D programs were canceled the following month in May of 2009 and production was scheduled to end by 2013... lower than projected sales of the RX-8 lead to production being canceled in June 22 2012..
    1
  1165. ***** “No plans now,” Kogai said in an interview Friday with automotive news Hans Gerimel for Autoweek "The Rotary will not return"
    1
  1166. ***** Please provide some evidence of an official statement for Mazda's PR department confirming production of the RX-Vision.. Because the only official news from Mazda is that it is nothing more than a Concept Car.
    1
  1167. ***** WRONG! Billions of dollars have been spent on the research and development of the Wankel engine and it has a well understood design for decades.. its also well understood that the design cannot compete with superior reciprocating technology that has pushed the failing Wankel completely out of the market place.
    1
  1168. ***** wrote, quote; " Mazda was the only one, along the now defunct NSU, that showed interest." WRONG! That statement only goes to confirm how little you know about the Wankel engine or the history of its development and production..
    1
  1169. ***** Try proving what you have said is true.. because its all ignorance, lies and false rumors
    1
  1170. Rotming WRONG, Mazda cancelled all research and development in May of 2009..
    1
  1171. Rotming Skyactiv-R is a nonexistent "Concept Engine" that was PROPOSED to power the RX-VISION which is a CONCEPT CAR..
    1
  1172. Rahul Namboodiri That is incorrect, I was and still am actually a huge fan of the C111.. So don't make assumptions..
    1
  1173. ***** So where is you evidence refuting my facts????
    1
  1174. ***** The facts are crystal clear.. after 51 years of only limited commercial production the Wankel engine is no longer available for sale by a single major engine manufacturer.. The Wankel engine became obsolete 4 years ago when Mazda the world's last manufacturer ended production
    1
  1175. Rotming The president of Mazda Masamichi Kogai has said officially the company has no plans to bring back its rotary engines
    1
  1176. Rotming Its not when the Insidemazda page is highlighting a CONCEPT CAR.. not a real life, fully developed car intended for production... you lack of knowledge regarding several basic fundamental aspects of the automotive industry make you appear very child-like and naive.
    1
  1177. Rotming No, just going by what has been released by Mazda as official company statements or the lack thereof.... and a firm grasp of basic common sense
    1
  1178. Rotming InsideMazda .com quote; "Working to realize the ideal internal combustion engine, Mazda returned to the drawing board and built the SKYACTIV-G gasoline engine and SKYACTIV-D diesel engine from scratch."
    1
  1179. Rotming This is what a real Mazda engine press release looks like.. http://insidemazda.mazdausa.com/press-release/mazdas-new-cx-9-feature-new-2-5-liter-direct-injection-turbocharged-gasoline-engine/
    1
  1180. ***** Look it up yourself.. it was featured in Autoweek magazine..a highly respected automotive news journal with history and credentials.. not some random internet blog pretending to be real news..
    1
  1181. ***** He also said that they will not be returning to production..
    1
  1182. ***** Mazda has no plans to produce either of the concepts designs called the RX-Vision or the Skyactiv-R..
    1
  1183. ***** Mazda has repeated stated that it will continue to fucus on development and production or Skyactiv-G® and Skyactiv-D® that the company currently produces.. Mazda newest model, the CX-9 is powered by a brand new 2.9 liter Skyactiv-G engine
    1
  1184. ***** Even if Mazda was working on the Wankel engine.. that still does not mean that the design will ever reach production.. Volkswagen for example was researching a steam generating fuel combustion cell and even tested it in a car.. but this technology never made it into production.. automotive companies research 100's of alternate designs that never reach production... YOU SEEM TO NOT UNDERSTAND THAT.
    1
  1185. ***** The problem is you insist that it isn't dead.. which is categorically untrue.The Wankel is dead, obsolete, no longer manufactured... The RX-Vision is a concept car.. something produced by an automotive manufacturers STYLING Department.. not powertrain development.. The RX-Vision was created to gauge public interest in a new direction in automotive "styling" but like many concepts that are never built often showcases exotic or fanciful experimental technologies that may or may not exist or available for production.. The RX-Vision may be a vision of what future Mazda may look like... but not any indication of the production powertrain systems that will propel them..
    1
  1186. Rotming And it is very clear that the world is finished with the Wankel..
    1
  1187. Rotming Just as the huge, giant automotive companies cannot afford to throw money away on research for engine technology that does not sell either.. Mazda being small, and heavily invested in the Wankel had no choice but to go forward in the 60's and 70's with production despite the rest of automotive industry which could write off the financial losses that were incurred and abandoned the design completely 30 years ago..
    1
  1188. Rotming But engineers already understand that the Wankel cannot be improved to match the efficiency of reciprocating engines... the problems with the Wankel are inherent to the concept itself..this is why the engine manufacturers and the engineering community has abandoned the Wankel in favor of better design solutions using reciprocating technology...
    1
  1189. Rotming The consumers have already spoken, they want cars with powerful, fuel efficient, reliable reciprocating engines.. they shunned the Wankel and the market dried up... not even a small company like Mazda could afford to manufacture such a low volume niche product.. especially one that has so many disadvantages as the Wankel did.
    1
  1190. Rotming The Wankel has been on a slow and steady decline into obsolescence since the early 1970's.. the really surprising thing is that it actually stayed in production as long as it did.. there is simply no logical reason why the Wankel should return...even if it could return in some type of very limited production there is no future in investing that kind of resources in to engine technology that has no hope of being widely accepted enough to be commercially viable again
    1
  1191. Koala Yup, unfortunately your engineering math is not very good.. The Mazda R26B engine found in the 787b has a total true displacement of 7.8 liters.. Under the FIA's sanctioning regulations which use the commonly accept "2X" conversion formula, the 787b's R26B was allowed to compete as a 5.2 liter with an special exemption to allow the car less weight and extra fuel " So if we figure the R26Bs specific output at its true displacement that is a pathetically low 89.7 hp-per-liter for a racing engine.. By using the "2X" formula we get 134.6 hp-per-liter, less than many street legal production cars... you can buy a street legal Ferrari with better specific output. "The highest power rx-8 which was the japanese NA, produced 250 hp. That translates to a specific output of {192 hp}."??? Wrong, the actual specific output would be 96 HP-per-Liter.. when compared to to other 4-cycle engines like Otto or Diesel types. No, the RX-7's twin turbo engines displaces 2.6 liters at 720° of eccentric-crankshaft rotation.. delivering only 106 horsepower per liter with forced induction.. AND A PATHETIC 89 ft.lbs of torque per liter You can buy a Diesel production car with 125 hp per liter.. or 187 ft.lbs. per liter!!!!!! No wonder the Wankel is dead..
    1
  1192. Koala The Wankel's horribly low specific output is also why it only holds the one single fluke win at Le Mans, while the Le Mans 24 hours has been won 9 TIMES BY A DIESEL!!!!!!
    1
  1193. ***** Not my rules.. The FIA rules, its also the same conversion formula used by automotive engineers and most government agencies for calculating the Wankel engines taxable engine displacement.. look it up yourself.. you guys need to learn more about the Wankel engine... that way you won't sound so ignorant and uneducated all the time...
    1
  1194. ***** Actually it really is a 7.8 liter.. but for the purpose of comparing its displacement to the 4-cycle Otto and Diesel engines we use the 2X formula which gives you its 5.2 liter displacement when it competed at Le Mans and elsewhere.
    1
  1195. Koala Its simple, so simple that even you can understand... the R26B engine is a type of Wankel KKM engine.. an engine that uses the 4-cycle operating concept... The Wankel engine (unlike the Otto type) must rotate its eccentric-crankshaft 1080° to complete its firing order sequence (instead of 720°) in this 1080° the R26B DISPLACES 7.8 cubic liters of air or gas.. making its true displacement (not published) 7.8 liters..
    1
  1196. ***** Oh my poor boy! You are so lost and confused here are you not??? The Wankel engine indeed has "PISTONS" the only difference is that they orbit in a distinctive planetary motion instead of reciprocating..
    1
  1197. ***** Some interest speculations and creative theories you have invented here son.. but the facts are clear.. the Wankel displacement is calculated in a non-standard method.. like some industrial Diesel engines which are published in promotional and sales material only by the displacement of a single cylinder..and the number of cylinders depending on its modular configuration? The Wankel displacement is only quoted by the displacement of a single chamber face and the number of chambers in its modular configuration.. eg; 2,3 or 4 chambers configuration such as found in the line of engines formerly known as the Mazda Rotary® brand.
    1
  1198. Koala The 787b never won a championship in the FIA World Sports Car series, nor did it win any other race in the series.. before or since. In fact the car was rather slow and uncompetitive.. with unimpressive, lackluster statistical results... never posting a fastest lap or winning a Pole Position in qualifying either..
    1
  1199. Koala Mazda had already decided in 1990 to retire the 787b at the end of the 1991 season and had signed a deal to purchase the Judd powered Jaguar chassis to replace the 787b for the 1992 season.. all before the 24 hour Le Mans race in 1991
    1
  1200. Koala Displacement is a calculation of the actual amount of air "displaced" by the swepted volume in a complete firing order sequence.. in the 2-cycle Benz type engines in 360° 4-cycle Otto type engines in 720° and 4-cycle Wankel KKM engines in 1080°
    1
  1201. Koala Indeed the only race it ever won.. in the FIA sanctioned series.. The Jaguar team won the 1991 championship..
    1
  1202. Koala The 787b competed in 21 FIA endurance races, winning only once.
    1
  1203. Koala I'm sorry, but the automotive engineering community and government motor vehicles agencies around the world do not agree with your assumptions and misunderstanding of how actual displacement is calculated
    1
  1204. Koala I don't know where you sourced your information but it is false and incorrect.
    1
  1205. ***** Its really simple, the Wankel KKM engine requires the eccentric-crankshaft to rotate THREE COMPLETE REVOLUTIONS (1080°) to match ONE COMPLETE REVOLUTION of EACH the orbiting pistons (aka "rotor" in Mazda slang) so unless you have not learned to count yet.? the R26B displaces 7.8 liters of air for one complete firing order sequence.
    1
  1206. Koala Audi R10 TDI alone has won 4 endurance series championships w/36 wins out of 48 races with 12 poles and 13 fastest laps The Audi R-series of Diesel cars won 8 out 9 Le Mans 24 hours races entered with Diesel engines with 5 consecutive wins (2010-2014) following its first string of 3 consecutive wins at Le Mans (2006-2008)
    1
  1207. Koala Here is a piece of logic that pretty much nullifies your argument. Like the Otto engine the Wankel cannot complete a single chamber's 4-cycles of intake, compression, ignition/expansion and exhaust cycles in 120 degrees of rotation.. I think you need to go back and rethink your fundamental understanding the 4-cycle spark ignition engine operation and design.. because you just earned an 'F' in Engineering 101
    1
  1208. Koala You are starting to reveal your very limited education in the field of automotive engineering...
    1
  1209. Koala Wankel engines make LESS power per liter.. its a major disadvantage of the design and a significant contributing factor in its demise.
    1
  1210. Koala Its a very accurate method... and its also the one used by engineers, motorsports sanctioning bodies and government agencies use everyday.. despite your "personal opinions" Should we all defer to your expertise in this matter? Or should we give it due weight and consideration based on absolute zero facts or experience?
    1
  1211. Koala You don't even understand basic fundamental concepts of ICE design.. If they did? they most likely would still be in production.. but they are not..
    1
  1212. Koala I'm not surprised.. you don't seem very familiar with any automotive engineering concepts.. Perhaps you would like to explain why Wankel engines have extremely low Carnot Cycle efficiency and extremely high BSFC.. Would you say that the Wankel has a High T2? or a Low Carnot 'T2'??? Would you say the Wankel design commonly exhibits BSFC in the 0.200 to 0.300 lb/hp-hr range or the 0.600 to 0.700 lb/hp-hr range???
    1
  1213. Koala From RX-7.com.. here is an interesting piece of text; "Rotary Displacement" As rotary engine enthusiasts, we all know the obvious, intoxicating charms of Wankel wonder. Unique, unusual, lightweight, compact, high revving, what’s not to like? One of the most commonly deliberated subjects is “what is the rotary engine’s displacement”? An excellent question. Here’s our best to make the case for the engine’s displacement. Conventional reciprocating engines are the standard that most relate to. We all know that these engines are measured by measuring the area of the bore, multiply by the stroke and then multiply by the number of cylinders. Simple as that. For simplicity, we’ll use the 13B engine as the standard we’re calculating. You can use these ideas and apply them to a 12A or 20B yourself. The rotary engine is obviously unique. The engine has two rotors shaped roughly like a triangle. This makes for three combustion faces per rotor and a total of six for a standard two-rotor engine. Each face has a “swept volume” or displacement of 40ci(654cc) and there are a total of six faces. With this known, the engine displacement should be 40ci(654cc) times six to equal 240ci(3.9L), right? In a way, yes, but that would not be a comparable displacement to the 4-cycle engine. The key for comparing the displacement between the 4-cycle engine and the rotary engine is in studying the degrees of rotation for a thermodynamic cycle to occur. For a 4-cycle engine to complete every thermodynamic cycle, the engine must rotate 720° or two complete revolutions of the crankshaft. The rotary engine is different. The engine rotor rotates at 1/3 the speed of the crankshaft. On two rotor engines, front and rear rotors are 180° offset from each other. Each rotation of the engine (360°) will bring two faces through the combustion cycle (the torque input to the eccentric shaft). This said, it takes 1080° or three complete revolutions of the crankshaft to complete the entire thermodynamic cycle. Obviously, we have a disparity. How can we get a relatable number to compare to a 4-stroke engine? The best way is to study 720° of rotation of the two-rotor engine. Every 360° of rotation, two faces of the engine complete a combustion cycle. 720° will have a total of four faces completing their cycle. 40ci(654cc) per face times four faces equals 160ci or 2.6L. That’s a well-reasoned number and now gives us something to be able to compare to other engines. In addition, since four faces passed by in the comparison, it’s like a four cylinder engine. Now we know, the 13B compare well to a 2.6L 4-cylinder 4-cycle engine." But of course any good automotive engineer worth his salt will tell you the same thing... just as I will.
    1
  1214. Koala Sad really.. because you don't seem to have learned anything...
    1
  1215. Koala I'll take that to mean you have conceded the argument and gracefully accept your concession... I must say I did enjoy the debate although I really hoped you might learn more from it.. here is Sect.27 18.0.B SCCA rules on computing Wankel engine displacement. Quote: "Rotary Engines (Wankel): These units will be classified on the basis of a piston displacement equivalent to twice the volume determined by the difference between the maximum and minimum capacity of the working chamber, times the number of rotors." http://cdn.growassets.net/user_files/scca/downloads/000/003/722/2015-1-27_section_18_modified_category_online.pdf?1432652725
    1
  1216. ***** Unfortunately many have speculated that the Mazda "patent phishing" case is somehow related to the RX-Vision... Mazda is not building the RX-Vision and the reapplication Patent protection case is completely unrelated.
    1
  1217. ***** Mazda canceled its development program for Wankel engines in May of 2009
    1
  1218. ***** WRONG, Mazda announced it new model lineup for 2017 at the New York Auto Show.. The CX-9, MX5-RF and the new Mazda 3 are already available and will be the only new models for 2017
    1
  1219. ***** Carscoops is an even less credible or respected automotive reference source, its nothing more than an individuals personal blog.. produced without any press credentials or accountability for accuracy and journalistic responsibility..
    1
  1220. ***** Mazda just released its flagship sports car, it is the MX5-RF all new for 2017
    1
  1221. ***** The RX-9 is a hoax, it never existed.. the rumor of the new vehicle suspected to be the RX-9 was actually the all new third generation Mazda 6 aka "Atenza" released in 2012.
    1
  1222. Anthony Awada No, you either very confused or a very bad liar...
    1
  1223. +Anthony Awada It appears to have been the later...
    1
  1224. Evan Shaw Go troll somewhere else..
    1
  1225. 0x EFEFEF Since Mazda doesn't make Wankel powered cars.. they won't be needing it anymore LOL!!!
    1
  1226. Ahmad Shumayal Yes, these cars, the earlier cars in particular have a very poor reputation for reliability and long term maintenance issues.. Wankel engines are also more prone to severe internal damage due to overheating because of there extremely poor thermal efficiency.
    1
  1227. Ahmad Shumayal There were some really good reasons why these cars did not sell very well and production ended.
    1
  1228. John Howell Indeed, there are no other cars like the old RX-8... No other company would be as foolish or crazy to try to sell a car with such compromised features and performance in a sedan.. Mazda proved that it was a bad idea.
    1
  1229. John Howell Reciprocating engines now offer superior performance while maintaining their superior efficiency, reliability and longevity... Mazda now sells a very successful line of reciprocating engines called Skyactiv which has proven more popular and profitable than the now obsolete Wankel
    1
  1230. John Howell It was well developed.. and the consensus found the Wankel was inherently inferior.. Absolutely false... that comment reveals a general lack of knowledge regarding the history and development of the Wankel engine. No, easier to develop the design with greater potential and better efficiency. The laws of physics and chemistry prevent batteries from ever matching the energy density or recharge rates of liquid or gaseous combustible fuels..
    1
  1231. Evan Shaw Just the facts here kid.. if you cannot accept the facts then go be an angry little troll somewhere else.. You do not intimidate me.
    1
  1232. Evan Shaw If it was such a great design, then why are they no longer manufactured anywhere in the world in series production in ANY application? Critics (like yourself) are often wrong.. and they were wrong because 50 awards still could not convince customers to buy them. The RX-8 was a huge sales disappointment and financial loss for Mazda that had no choice but cease development and production to save the company from financial ruin.
    1
  1233. Fact: Mazda no longer manufactures or sells the RX-8 or the Wankel engine... what facts do you have?
    1
  1234. Evan Shaw Fact: Mazda no longer manufactures or sells the RX-8 or the Wankel engine... what facts do you have?
    1
  1235. Evan Shaw Apparently logic escapes you... if it was a viable design why is it not manufactured and sold commercially anymore?
    1
  1236. Evan Shaw Well, no hope of you ever becoming a rocket scientist either... if it has more than 2-doors its not a coupe or a sports car.. its a sedan.
    1
  1237. Evan Shaw No.. it just shows how entertaining I find your "comments"
    1
  1238. Evan Shaw 100% factual and true.. just the facts here... sounds like someone else here is in denial..
    1
  1239. Evan Shaw You can't change the fact that the Wankel is dead.. just accept and move on.
    1
  1240. Evan Shaw LOL!!!!!!! Youa really are in denial! Hahahahahaha!!!!!!
    1
  1241. Evan Shaw You cannot argue that the Wankel isn't obsolete... the worlds last manufacturer ended production 4 and half years ago..
    1
  1242. Evan Shaw wrote, quote; "As I already explained... the wankle(Wankel) has undergone maybe 10% of the same level of development as that of the piston engine (and that's being generous)." That statement only reveals how little you know about the history or development of the Wankel design.
    1
  1243. Evan Shaw Yet the Wankel never saw widespread success in competition and produces less horsepower per liter than Otto engines...
    1
  1244. Don't mind terry... he is young, drunk and angry... LOL!!!!!
    1
  1245. AE86 of Mt. Akina How can it be confirmed when it does not even exist?
    1
  1246. AE86 of Mt. Akina Just another false rumor, Wankel engines are obsolete now
    1
  1247. AE86 of Mt. Akina HOAX
    1
  1248. AE86 of Mt. Akina So? The Otto engine is not obsolete.. only the Wankel is.
    1
  1249. AE86 of Mt. Akina Exactly, the chances of the Wankel engine making a comeback is just as unlikely as Hillary ever becoming president.
    1
  1250. +MElekia Glad you still alive! Mazda CEO CONFIRMS RX-9 HOAX! http://www.mazda-motors.com/news/mazda-says-no-to-rotary-engine-and-larger-sports-car/
    1
  1251. +mjouwbuis LOL!!!!! ROTRON!!!!! Are you really that gullible son? Rotron is not an engine manufacturer.. its a scammy little vaporware hypesite... operating out of a BARN in the middle of the English countryside...Hahahaha..
    1
  1252. +applepwnz Unfortunately last week Mazda's CEO gutted all the rumors of a new RX.. and confirmed that the company has no plans to bring back the RX line.. cheers
    1
  1253. +vuriby The Wankel had been on a long slow decline into obsolescence for decades.. anyone claiming that this outdated and inefficient technology had any chance of making a comeback lives in a vacuum and is completely ignoring the overwhelming volume of evidence which clearly shows otherwise. Mazda knows very well it can not build cars with Wankel engines.. but it is faced with financial losses related to the huge investment it has made in this now obsolete design, in the interest of saving face it must continue to maintain the outward appearance to public (and common stock share holders) that the company is still looking for ways to cash in on this investment rather than admit failure by writing the programs off as a complete loss.
    1
  1254. +vuriby Mazda was the very last company to mass produce Wankel engines, when it ended production in 2012 the Wankel effectively and literally became obsolete. Mazda's CEO recently reconfirmed what he has been stating publicly all along... That the company has no plans to produce a Wankel powered vehicle ever again..
    1
  1255. +vuriby The Wankel engine has a very solid track record of colossal financial failure for every company that was involved with its development or production... the design never saw success in any applications other than the very limited automotive use until 2012.
    1
  1256. +vuriby The companies final attempt at producing a RX sports car (RX-8) bankrupted the company... If not for the 3 massive Japanese Government backed bailout loans from Japans biggest banks, Mazda would no longer exist.. the company is now profitable selling reciprocating engines but is still heavy in debt.
    1
  1257. +Evan Shaw "Mazda" did not exist or produce vehicles until 1936. its Parent company Toyo Cork Kogyo Co was founded in 1921 and had to be bailed out in 1928. I guess you didn't do much research? After attempting to launch an all Wankel powered line-up in 1972 the company suffered dismal sales and racked-up huge losses by 1975 Toyo Kogyo, on the brink of bankruptcy and was bailed out a again, this time by Sumitomo Bank who was forced to install a Sumitomo appointed CEO Yoshiki Yamasaki. After 4 years of billion dollar losses 2008-2012 (1.5 billion USD in 2012 alone) Mazda was bailed yet again with 3 billion dollars in government backed loans from Sumitomo Bank, Nippon Master Trust Bank and JTSB/Daiwa Bank.
    1
  1258. +Evan Shaw nah, I think your are just in denial of the truth regarding Mazda's long history of financial failures due to the Wankel engine.. and why the Wankel is obsolete.
    1
  1259. +Evan Shaw 1.815% of their vehicles sold doesn't sound like enough to even recoup the investment in vehicle design... let alone what Mazda lost on engine development of the Renesis Are you having a laugh..? The RX-8 never turned a profit.. in fact it probably accounted for its single highest loss leader in this time frame...
    1
  1260. +Evan Shaw Are you seriously doubting the companies CEO??? Masamichi Kogai has publicly stated on several occasions that the company needs to sell an average of 100,000 units per year just make a model profitable. I think you are seriously in denial of the facts here..
    1
  1261. +Evan Shaw Sounds like you flunked Economics
    1
  1262. +Evan Shaw sounds like you cut and pasted that entire comment lol!
    1
  1263. +Evan Shaw Reciprocating engines can run flexibly on a wide variety of fuels, including gasoline, hydrogen and even kerosene... without all the problems that the Wankel brings...
    1
  1264. +Evan Shaw The Wankel is obsolete.. it is no longer manufactured in series production anywhere in the world..
    1
  1265. +Evan Shaw The Wankel was a complete failure in every application except for its limited production in automobiles until 2012.
    1
  1266. +Evan Shaw Wow! you really are delusional!!!!
    1
  1267. +Evan Shaw The Wankel engine's obsolescence is an irrefutable fact.. it is no longer manufactured or sold for production automobiles, or any other any other mass produced applications.
    1
  1268. +Evan Shaw If the Wankel offered ANY significant advantages? It would still be in production.
    1
  1269. +Evan Shaw Clearly the Wankel is dead.. dead and buried. Just as many examples other obsolete designs can still be found in working condition.. this is certainly no proof of technological relevance.
    1
  1270. +Evan Shaw You sir are clearly delusional and out of touch with reality.. The Wankel has never seen any success in applications where power-to-weight ratio is of critical or primary design priority. All such applications have been dominated by Gas Turbine engines or rocket propulsion. The Wankel DOES NOT offer any significant advantage in power-to-weight ratio compared to reciprocating and current technology reciprocating designs offer greater torque-per-liter and horsepower-per-liter.
    1
  1271. +Evan Shaw FALSE, completely false.. the Mazda Renesis for example has over 235 moving and seal related parts.. NOT 3. Wankel engines HAVE A NARROWER power band with an absence low end power and in particularly, Torque being noticeably deficient compared to reciprocating designs
    1
  1272. +Evan Shaw not true, V-12 reciprocating engines have power pulses that overlap completely and are considered much smoother than any Wankel engine ever produced.. You really seam to lack a practical working knowledge of engineering or automobile design..
    1
  1273. +Evan Shaw Sorry, but if the Wankel has any significant advantage in power-to-weight ratio? Why has the design never been used in production commercial, civil or military aircraft?????
    1
  1274. +Evan Shaw The notion that Wankel engines have a significant advantage by having fewer parts is a myth.. Please name an example of a 6-chamber Wankel type engine used in a production application??? You seem to live in a delusional world where reality is an unfamiliar concept to you..
    1
  1275. +Evan Shaw So Formula 1 engines from the 1980's didn't produce 1,000 hp-per-liter..? Please give an example of a Wankel producing those numbers on a road course in a major Motorsports series???? Without oxidized fuels or or oxide injection?
    1
  1276. The Wankel is not inherently smooth running either.. it must convert orbiting motion into rotational motion.. and typically requires a flywheel and balance weight/ harmonic damper.. Wankel engines are generally limited to lower rpm range than reciprocating engines that have higher rev capabilities.
    1
  1277. +Evan Shaw Motorsports have ALWAYS been dominated by reciprocating technology.. the Wankel has NEVER seen widespread use in any applications.. including racing and drag racing.
    1
  1278. +Evan Shaw The Wankel has been well known throughout its history as being LESS reliable and have shorter service life than available reciprocating engine designs... it is one of the major contributing factors in its demise in production automobiles
    1
  1279. +Evan Shaw Flat or Boxer engines also offer low center of gravity.. but have not replaced the other configurations because it is simply not a significant advantage in motorsport or production design.
    1
  1280. +Evan Shaw You don't seem to know much about racing.. motorsports have always been primarily financed and supported as a sales tool and brand name advertising..
    1
  1281. +Evan Shaw Then explain why the most reliable and longest lasting engines in the world have thousands of parts and rarely ever fail???
    1
  1282. +Evan Shaw Not true, Mazda was not the only company to use the Wankel in competion.
    1
  1283. +Evan Shaw The Wankel's use in Motorsports has always been extremely limited.. and for the most part insignificant.
    1
  1284. +Evan Shaw "Constant refinement over decades by hundreds of manufactures and millions of people." Then why are steam engines obsolete in vehicles???
    1
  1285. +Evan Shaw It would be very unlikely to see any popular Motorsports series without significant sponsorship from manufacturers and suppliers...Wankel engines are no longer represented by manufacturers and its market has always been insignificant... its presence is very small and its future is bleak.
    1
  1286. +Evan Shaw most major series have never banned the Wankel engine.. there simply isn't any real sponsorship interest in a product that is no longer sold.
    1
  1287. +Evan Shaw The Wankel has never been widely accepted or popular in motorsports just as it has never been popular in production... it has been largely abandoned in motorsport as its production dwindled and finally ceased in 2012.
    1
  1288. +Evan Shaw All sports are based on popularity..
    1
  1289. +Evan Shaw The premise of your argument was that the Wankel engine was not obsolete... on this debate you have failed miserably.
    1
  1290. +Evan Shaw Wankel engines have been completely obsolete since its last and only remaining manufacturer abandoned production in 2012.. Your childish insults will not prove otherwise.. or bring back the Wankel.. My advice to you is to start getting used to the fact that the Wankel is gone..you have no choice but to accept the truth that this engine design was a dead-end technology and it finally reached the end of the line
    1
  1291. +Evan Shaw You certainly wouldn't argue that steam cars or steam locomotives were not dead?
    1
  1292. +Evan Shaw The last company mass producing the Wankel engines ceased production in 2012.. there are no longer any engine manufacturers selling them in regular series production... This means that the Wankel engine is now obsolete..
    1
  1293. +Evan Shaw Discontinued, No longer available...Obsolete
    1
  1294. +Evan Shaw As in sports, just as in all things there are winners and losers... the Wankel was a loser.
    1
  1295. +Evan Shaw Or maybe you are just in a complete and total state of denial
    1
  1296. +Evan Shaw Mazda no longer manufacturers Wankel engines. Why do you refuse to accept this irrefutable fact?
    1
  1297. +Evan Shaw Its Over, its dead. Its time to accept the truth and move on now... no one likes a whinny, childish, sore loser.
    1
  1298. +The Little Guy's Game Sounds like someone is still in denial.. its called a Wankel engine, "Mazda Rotary®" is a defunct brand of Wankel engine..
    1
  1299. The Little Guy's Game what's your point? Some people didn't know that they are obsolete now.. don't be a cry baby.
    1
  1300. June 22, 2018 marked the 6 year anniversary of the death of the poor Wankel engine, 6 years ago today June 22, 2012 at 4:30pm the Wankel engine assembly plant at Mazda's Ujina #2 shut down and shortly there after was dismantled to make way for a brand new engine assembly facility at Ujina #2 specifically designed to manufacture Mazda's successful new signature Skyactiv-G ® line of reciprocating Otto type engines.
    1
  1301. MAZDA'S NEW 4-CYLINDER SKYACTIV-X REVEALED, COMING IN 2019 https://insidemazda.mazdausa.com/newsroom/2017-tokyo-motor-show/
    1
  1302. Reeks of vaporware scam..
    1
  1303. same crappy engine
    1
  1304. Without any doubts the worst RX model ever made... a car so horribly designed and built that it killed off the entire RX brand and nearly brought the end of Mazda too.
    1
  1305. NOT TRUE! Sales of the RX-8 TANKED during the economic boom... RX sales were in steady decline from 1986. The FD was a loss-leader, Mazda planned to loss money on every unit sold until it reached 250,000 units... the FD only sold a disappointing 68,589 units. For the RX-8, Mazda returned to its old market strategy of Volume Sales Mazda had hoped for RX sales to average 100,000 units per year... this plan was also a tragic failure. Mazda lost an estimated $3 billion in development and production costs with the massive Ujina#2 plants assembly line sitting idle up to 6 days per week.
    1
  1306. "rx-8 is a fantastic platform" Indeed it should be, its based on the MX-5, Mazda's best seller from its introduction and is still one of Mazda's top sellers... its currently the world's most popular 2-seat sports car with over 1 million units sold, while the RX-8 on the other hand was a costly mistake Mazda would rather forget about... especially the RX-8s notorious bad reputation for poor reliability and premature engine failure.
    1
  1307. Also NOT TRUE, When Mazda purchased the rights to build the Wankel engine from NSU in July 1960 it had no successful automobile engines of its own. Mazda was purchased out of bankruptcy by Ford in 1974 after Mazda's miserably failed attempt to launch a full line of automobile powered only by Wankel engines. Ford introduced new reciprocating engines and brought Mazda back to profitability.
    1
  1308. Really? Because it sounded like you were unaware that Mazda's original plan was to only build cars with Wankel engines... and when that failed, Ford stepped in. Like all of the 26 original Wankel KKM licensee's Mazda has abandoned the production of Wankel engines and now only builds reciprocating engines
    1
  1309. +DemonSlayer879 The FB chassis was far from cutting edge in 1985... a very inferior outdated design from a manufacturer of small, cheap entry level cars. The RX-8 is built on Mazda's best selling sports car's chassis... The MX-5!
    1
  1310. Most of the ones for sale have a dead engine... any one familiar with these cars knows this... but perfect car for an LS swap though.
    1
  1311. Wilbur Finnigan And Packard fixed all the flaws with the Merlin.. like the fuel stalling in a dive...  
    1
  1312. Wilbur Finnigan Packard also made parts THAT WOULD ACTUALLY INTERCHANGE with other engines of the same model 
    1
  1313. +William Gruff The Packard V-1650 was superior to the original R-R engine in several key aspects.. most important of these was the Bendix-Stromberg PD-18 pressure feed carburetor that completely solved the Merlin's most egregious and deadly flaw... its pathetically outdated and inferior SU float valve carb. So good was the Bendix design that R-R later adopted it, then copied it!
    1
  1314. +jackpontiac52 Well that's good that you didn't, you would have flooded the plugs and cause the to engine stall... Just like the R-R Merlin did! Lol!
    1
  1315. +18tangles Sorry "Tiger Moth" but its all true...
    1
  1316. +18tangles The brits didn't have a pressure feed carb... Thats why they were still using an outdated, obsolete float valve carb!
    1
  1317. +18tangles "Tiger Moth" The brits were receiving shipments of Packard V-1650s fitted with the Bendix PD-18 long before they even started installing them on the R-R version..
    1
  1318. +18tangles wrote quote; "THAT IS CRAP. I HAVE NEVER HEARD SUCH FUCKING BULLSHIT" You had never heard of 'WEP' either until I explained it to you... you foolishly believed that a Spitfire could fly around all day at top speed... when nothing could be further from the truth!
    1
  1319. +18tangles No, the real question everyone wants to know is... Did you take your Alzheimer's medication today...???
    1
  1320. +18tangles Gone up the boohai shooting pukakas again aye Tiger Moth????
    1
  1321. Just another fake RX-9 rumor that will never come true.. Remember when everyone was convinced the new RX-9 was coming out in 2012??? and it turned out to just be the new Mazda6.. If its not confirmed by mazda? its simply not true.
    1
  1322. Much better choice for a first car.
    1
  1323. Take a moment to educate yourself on the Wankel KKM-57..... because Mazda never built a Rotary engine... not ever.
    1
  1324. I pretty sure the largest engine recall in North American history and a bad reputation for premature engine failure is what keeps the resale prices down.... you can have them all!
    1
  1325. Dustyice You didn't answer the question...
    1
  1326. Dustyice Its a simple question... anyone that knows about Rotary engines should know the answer... Is the question too difficult for you??? 
    1
  1327. Dustyice What? C'mon now.. You seem confused... first you come off like you are some sort of expert on Rotary engines, now you can't even answer a simple question? Who invented the Rotary internal combustion engine? 
    1
  1328. Toxicslayer64 Pino7272 No, I do not. Well, if you don't know very much about engineering you might feel that way.. but that just your opinion.... The difference is I actually know something about them... If you did? you could answer the question; "What is the difference between a Wankel KKM and a Rotary?"  Cheers!
    1
  1329. Dustyice Fun fact:  Mazda has never manufactured or sold a Rotary engine. 
    1
  1330. Dustyice It is 100% true.. if you were educated in engineering? you would understand what I am talking about... but since you are not... ?
    1
  1331. The Wankel was an epic engineering failure... even Mazda dropped it like a bad habit over 6 years ago!
    1
  1332. @Sam Power Was there something posted that is not true??? Or did you disagree and just bitter because you cannot make a valid argument.
    1
  1333. @Sam Power Clearly you have an issue with accepting the truth which conflicts with your personal opinions... what do you hope to achieve by attacking the messenger?
    1
  1334. @Sam Power I would say you are nothing but a pathetic troll, an internet bully. Off-topic, hate filled comments and ad hominem attacks? What is your point? What gives you the right to insult me because you do not respect my right of freedom of speech or to express my opinions? I will not be intimidated or bullied by your troll remarks. If someone posts a comment which is false, misleading or an outright lie? I have the right point out this deception... those who lie can offer a case to support or defend their statement or they can concede that they have been exposed as being fraudulent, dishonest or just plead ignorance. You are free to agree completely or If you disagree? You are free to defend their position by proxy... what you don't have is the right to judge me or anyone else for speaking the truth.
    1
  1335. @Sam Power You don't intimidate me son... nor will you drag me down to your level... a pathetic, narcissistic troll consumed with maintaining a false sense of superiority.
    1
  1336. @Sam Power Your welcome kid, now grow up and go do something useful with your life.
    1
  1337. @Sam Power Go troll somewhere else kid... you don't intimated me one bit.
    1
  1338. @Sam Power Off topic remarks and ad homimen attacks, you are the epitome of an internet bully, a pathetic troll.
    1
  1339. @Sam Power Thank you, I hope you have better luck trolling elsewhere... your efforts here were futile.
    1
  1340. @Sam Power 👍
    1
  1341. @Sam Power Wow dude... you really have issues...
    1
  1342. @Sam Power Childish insults only mean that you have conceded this exchange... don't be a sore loser.
    1
  1343. @Sam Power The truth hurts doesn't it? Its time for you to move on... your efforts have been a failure.
    1
  1344. @Sam Power I'm not going anywhere kid... trolls like you do not intimidate me at all.
    1
  1345. Wilbur Finnigan Tangles is a little slow (and stubburn) but if you hit em in the head enough times he does actual learn... I seen this myself.
    1
  1346. Gary Tarr don't forget Wilbur is not only bigoted and hateful senile old coot... his not very well educated either  
    1
  1347. Wilbur Finnigan Every one knows the Packard engine was better... the pilots knew this if they had flown both
    1
  1348. Gary Tarr The Packard engine was better... everyone knew this fact... they even fixed the terrible problem R-R was having with fuel starvation...   
    1
  1349. barracuda7018 The Merlins small displacement and lack of fuel injection mean it was quickly outdated as the war dragged on.. only the use of extremely high manifold pressure during WEP kept the Merlin in production.. but at a terrible cost.. reliablity and service TBO's were dismal.. a later series high output Merlin would last as little as 8 hours if WEP was used repeatedly and required an inspection and spark plug replacements each time WEP was used .. and its performance was sluggish and insufficient with only military power settings (w/o WEP).
    1
  1350. Wilbur Finnigan Yes, and used the Bendix pressure feed carburetor.. far superior to the Rolls-Royce original fuel system which plagued with performance flaws...
    1
  1351. +george-LA Wow! that's an ironic comment considering how overpriced these cars are already!!! Well, they had basically 3 options, Use cylinder deactivation, 2. drastically reduce power output or 3. discontinue the engine altogether and replace it with a more efficient V-6 or a turbo 4-cylinder. which option would you prefer? Aluminum might be a practical option IF we were talking about a primitive, outdated, low performance, low rise single plane or cross-flow manifold design from half a century ago. but if you looked at how bulky and complex the advanced variable tract manifold is? you would immediately see the advantage of COMPOSITE construction techniques.. not to mention they have been successfully used by other manufacturers for over 2 decades. I'm surprised you have no objections to VVT technology.. although generally very reliable they do sometimes fail like any other component.. they eventually... sooner or later require expensive replacement too.
    1
  1352. Mark Melrose And DOES NOT  mind paying for a new engine....  Flooding is a sure indication that the apex seals are already damaged and the engine is well on its way out... Cheers!
    1
  1353. Mark Melrose Wrong, replacing an ignition coil that has not failed, replacing your oil more often, using Sea-foam or some other snake oil remedy will not save an apex seal that is already damaged. This is the sort of typical nonsense, wives tales and magic tricks that fill the forums with all sorts of BS.   Flooding is a sure sign of low compression, usually due to bad apex seals that have begun to fail.   If your engine has flooded you need to have the compression tested  (correctly tested)   if its below 98psi on any chamber your engine needs to be replaced.   But don't feel too bad,  most RX-8 owners have had there engine replaced too.. unfortunately for you though you bought a car that was already out of warranty so sadly you will be paying out of pocket instead of Mazda getting the bill.
    1
  1354. ***** No you can't call it a "Hemi"   but since Fiat's Chrysler div. owns the rights to use the name HEMI®       So in terms of brand name, they can call a flathead type engine a HEMI® brand name engine.
    1
  1355. Daisy Dawson Engines with flat topped pistons and clearly defined quench areas are NOT hemispherical type. HEMI® brand and hemi type are not the same thing...
    1
  1356. Daisy Dawson Its a 2 valve Pentroof  head... not a hemispherical type. Hemi's dont feature a squish or quench integrated into their design.
    1
  1357. Daisy Dawson The Ford 429 is not a hemispherical type head... like the Daimler-Chrysler HEMI® brand engines, they are a Quench type head design..  
    1
  1358. +Moggy1000 The P-51 also used the Merlin engine.. and it had a superior carburetor than the spit
    1
  1359. There is no RX-9... it doesn't exist. Mazda does not sell the RX line anymore.
    1
  1360. lifeof Brian All having the same fatally flawed SU carbs?
    1
  1361. ***** Thanks to the technically superior Bendix pressure feed carburetor Packard Merlins did not suffer from any of the flaws of the Rolls-Royce version..
    1
  1362. +Bruce Bartup I don't believe anyone here is espousing the tenants of fascism or fascist regimes... whether it be the british royal family or German national socialism. The Tizard Mission's initial attempt to SELL british technology in order to save the country which was at the time losing the war and weeks away from financial insolvency.. failed to receive any offers, the second Tizard mission offered the technology in exchange as security on the massive multi-billion dollar Anglo-American Loan program. The R-R Merlin was not a part of this bail-out loan. Actually by the year 2000, but the brit government defaulted on the loans 6 times.. ""There's a heap of this Nazi re-appreciation around right now"" Perhaps because of the lack of appreciation for American and Canadian assistance in preserving what is left of what many feel is an ungrateful british "empire" Bobs your uncle..Cheers mate!
    1
  1363. The royal family certainly did not attain it position through democratic elections.. The brit have always been known for a great sense of history... until it comes to the facts regarding the Tizard Missions and the Anglo-American loan, on this topic their collective memories begins to be considerably more fuzzy..Lol I suggest you try "deferring" you automobile or mortgage payment.. and see what happens! No, I was referring to WW1 and WW2.. but you could also include the considerable investment America made in maintaining stability in Europe during the Cold War while the british empire continued to slowly implode during the post war period. The previous comments are irrelevant regarding Rolls-Royce's flawed Merlin engine.. Packard did indeed improve the design by discarding the obsolete SU carb and replacing it with the American Bendix-Stromberg PD-18... after that, the flooding AND the fuel starvation flaws were both solved. Cheers mate!
    1
  1364. +Bruce Bartup It appears your knowledge of aircraft fuel delivery systems is not as extensive as you believed.. even with the help of the internet.. cheers!
    1
  1365. +Bruce Bartup said, quote; "The introduction of turbochargers shortly thereafter on Spitty mk IX" The Spitfire IX was never turbocharged.. it used the Merlin 61/63 engine.. the first to use the stronger Packard 2-piece engine block design and the 2 stage, 2 speed supercharger
    1
  1366. The big story is the notorious failure rate of its Renesis engine
    1
  1367. Please learn that they used the same engines and carbs...
    1
  1368. You can't anymore... they have been discontinued for several years
    1
  1369. There is no new Roadster...
    1
  1370. A car that is not real and not available serves no purpose.
    1
  1371. Sales of electric vehicles has been stagnant... they remain a tiny niche market segment.
    1
  1372. WHY WOULD ANY AUTOMOBILE MANUFACTURER COMMIT TO OFFERING ANYTHING BEYOND THE LEGAL REQUIREMENTS IF THEY ALL LOSE MONEY???
    1
  1373. Electric vehicles have been around 130 years and will continue to exist in a very tiny, limited market segment... they will always be around in specialized applications where range and cost are not primary factors what they won't be doing is ever replacing vehicles that use liquid or gaseous fuels.
    1
  1374. +Godfrey Poon They could also be run on giant rubber bands and you could set-up "winding stations" every mile or so powered by unicorns and manged by elves.
    1
  1375. +Godfrey Poon If I was ridiculous? I would be promoting Wankel engines!!!
    1
  1376. +Godfrey Poon Actually the company is called Total now...
    1
  1377. Then why does the Me-109 have more kills?
    1
  1378. So? The Me-109 has more kills... it is the most successful fighter aircraft IN HISTORY! Its dominance in the air as an air superiority fighter has never been matched.
    1
  1379. I'm just stating the facts, facts which are irrefutable.... no fighter aircraft type in history has more combat kills attributed to it than the Me-109.
    1
  1380. @rayford21 The 109 is credited with more air-to-air kills than any other aircraft in history. It flew in combat for 13 different countries with over 15,000 aerial kills for the Luftwaffe alone and there were 2,500 German 109 Aces. This is a widely known and understood fact that can be found in many reference source materials on this topic including Janes, Luftwaffe Diary by Uwe Feist and Barbarossa: The Air Battle July-December 1941 by Christer Bergstrom. Not true, Bayerische Flugzeugwerke ceased to exist on the 11th of July, 1938 went it became Messerschmitt AG. The official RLM designation prefix changing for all aircraft from "Bf" to "Me" and all 109 manufactured after 1938 are Me-109s while the earlier "Bf" prefixes can be found remaining on some documentation clear up until the wars end. Cheers!
    1
  1381. Battery for the glow plug
    1
  1382. Nitro-fuel glow plug engines generally run extremely rich... or they won't run at all.
    1
  1383. Yes, in terms of combustion efficiency and thermal distortion? Indeed the Wankel is very unstable... its also why its an obsolete technology.
    1
  1384. Nice video... shit engine design.
    1
  1385. Why?
    1
  1386. Indeed, 'Rotary' is an incorrect term to use especially if you are not referring to a Mazda brand product specifically and this brand is now also defunct... this is a WANKEL engine..
    1
  1387. Fortunately no one has been dumb enough yet to make a one.
    1
  1388. Bear shit... an appropriate name after all...
    1
  1389. The 13B Renesis has an actual total displacement of 3.9 liters... 2.6 when we use the "2X" conversion formula for comparing it to engines with a 720 degree firing order.
    1
  1390. 77 hp per liter is not impressive... you can buy a Diesel car with more hp per liter.
    1
  1391. Were talking a Wankel engines... and I not really surprised, most RX fans are not really car guys either.
    1
  1392. Mazda didn't invent the Wankel engine... and this engine was made by Graupner GmbH. in Germany.
    1
  1393. Maybe downhill with a tailwind, or your math skills are bad? These horrible ugly little cars that are so unreliable Mazda discontinued them.
    1
  1394. You mean WANKEL engines??? Mazda (Toyo Kogyo Cork ltd.) became a WANKEL KKM licensee in 1960 and sold them under the registered trademark "Mazda Rotary" after the agreement with NSU Motorenwerke GmbH expired. Mazda has never sold a Rotary type engine and today only sells reciprocating engines.
    1
  1395. I have seen RX-8s receive 3 new engines under warranty in as little as 60,000 miles and had fully documented service records. Mazda could not supply enough warranty replacement engines and opened a new facility in Chesterfield VA. that rebuilt over 25,000 failed Renesis engines not counting outside sub-contractors and new engines supplied from Japan. Which means that there was a minimum a 50% failure rate under the warranty period which was only extended to 100,000 miles after Mazda lost a class action lawsuit for covering up the premature engine failure fiasco by destroying consumer satisfaction surveys from RX-8 owners.
    1
  1396. WRONG! An automobile engine is not a motorcycle engine. Not true, the primary failure mode of apex seals is completely unrelated and is more likely to occur at high rpm. Incorrect, you obviously do not understand the dynamics of hydrostatic journal bearings or oil injection systems. Reciprocating engine do not suffer from the same reliability problems as Wankel engines... NOT TRUE The NHTSA Recall investigation dispelled this false urban myth forever, owners with fully documented service records still suffered premature engine failures. BULLSHIT! If your RX engine experiences hard starting and flooding even though it has been properly serviced it is suffering from loss of compression due to damaged seals... these engines start just fine when new and only have problems after the apex seals begin to or gave failed completely.
    1
  1397. +Joseph Gross NO, You Are INCORRECT. The Wankel engine was designed as a MOTORCYCLE engine and was never considered for aircraft application until Curtis-Wright became an NSU-Wankel licensee. Felix Wankel, Walter Froede and Hans Paschke worked at NSU Motorenwerke GmbH. in the MOTORCYCLE Division. Not surprising that someone so ignorant of the history and development of this design could be so enamored with a failed, obsolete engine design. Mazda only makes reciprocating engines now, the Wankel is no longer mass produced or series manufactured anywhere in the world... and it was never used in any FAA or EASA certified flight-worthy production aircraft.
    1
  1398. MX is the only "X" cars sold by Mazda now.
    1
  1399. @Cody Volff Son, you don't even know who invented the Rotary engine, and I can prove it!
    1
  1400. @Cody Volff Yes, you are a moron... The Rotary type engine was invented by Félix Millet in 1892... you are obviously too dumb and uneducated to understand the difference between the WANKEL engine and the ROTARY type engines!
    1
  1401. @Cody Volff So you really don't know the difference between a Rotary and a Wankel KKM engine???
    1
  1402. @Cody Volff Are you really so dumb to think the engine in your Mazda was invented by Felix Wankel??? You clearly no nothing about Mazda engines or cars in general do you? Not surprising really you have to be really ignorant about car to buy one in the first place!
    1
  1403. @Cody Volff Wrong again kid... you are still completely lost on the basic engineering concepts here... Please tell us what defines a Rotory type ICE, and what key design feature distinguishes it from an engine with a conventional or non-rotary layout???
    1
  1404. @Cody Volff I see you are still very confused son, Felix Wankel did not design the KKM... the KKM was designed without his assistance and was done completely without his knowledge... in fact Felix Wankel HATED the KKM engine.
    1
  1405. @Eatinbritches Seriously, you are just an ineffectual troll boy
    1
  1406. This week marks the 10 year anniversary of Mazda's decision to axe the RX-8, the entire RX brand and cancel further development of production Wankel engines... its been a quarter of a century since Mazda unveiled a new production Wankel engine.
    1
  1407. @Rui Cameira The Mazda 13B engine is not a 1.3 liter... its actual displacement is 3.9 liters.
    1
  1408. @Rui Cameira Ford bought Mazda from a Japanese bankruptcy court sale in the 1970's... Mazda was owned by Ford in the 1990's and was the only time Mazda was successfully profitable.
    1
  1409. @Rui Cameira WRONG! Felix Wankel worked for a motorcycle company NSU MotorenWerkes GmbH. None of his designs were ever used for aircraft or cars... only one prototype was ever built.
    1
  1410. @Rui Cameira No, not true... Mazda did not stop production and Ford and Mazda shared many platforms and engines eg; Ford Courier/Ranger and Mazda B-series, Ford Explorer and Mazda Navajo, Ford Probe and Mazda MX-6, ect.
    1
  1411. @Rui Cameira Wrote, quote; "MAZDA is the rolls royce of the orient" Hahahahaha!!!!!!That is the most funny thing I have ever read!!!! Are you a professional comedian???
    1
  1412. The later RX-7s have a Mazda 13B series engine... the actual total displacement is 3.9 liters. You see, each orbiting piston(rotor) has 3 sides forming 3 combustion chamber volumes, each with a swept volume of 654cc. times the 2 housings is 6 and equaling 3,924cc. The other important thing that people without formal engineering experience fail to understand is that a 4 cycle Otto or Diesel engine completes its firing sequence in 720° of crankshaft rotation while the 4-cycle Wankel KKM designs required 1080° of rotation to complete its firing sequence... These two important and often misunderstood details are the basis of the commonly used "2X" conversion formula for accurately "comparing" the displacement of the Wankel with other designs.. Any questions? I would be happy to explain in more detail...
    1
  1413. The contrived "Tax Displacement Method" was created by NSU in Germany well before Mazda purchased the design from them, as Japan had a similar tax code regarding tax per engine size they simply kept the same method for calculating displacement. This tax advantage was seen as a selling point and a way to off-set the Wankel poor fuel consumption... a way to explain to customer that although they will spend significantly more on fuel related costs this would be off-set by a huge saving in registration tax in some countries. American designs used total displacement instead of the "Tax formula method to calculate the displacement as the U.S. uses Gross Vehicle weight and MPGs to tax vehicles for registration not engine size. There is simple no advantage to misrepresenting the displacement, in America a larger engine size implyies higher status and greater value for money. For example, the General Motors RC2-206 Wankel was the same swept volume of the Mazda 12A Wankel but GMs engine used actual displacement, it had a published displacement of 206 cubic inches (3,380 cc).
    1
  1414. Automotive Engineers, Motorsports sanctioning bodies and government revenue agencies all classify the Wankel under the "2X" conversion formula eg; a Mazda 13B as 2.6 liters instead of its true displacement of 3.9 liters. You must not forget that all Wankel engines are 4-stroke... but require 3 revolutions. This why the 13B is considered a 2.6 liter when comparing to other 4-strokes even though the true displacement is 3.9 liters in total. In summary, each flank(face) of the 3-sided piston(rotor) is seen to undergo the same intake, compression, ignition, power, and exhaust processes as in a four-stroke-cycle reciprocating Otto engine.
    1
  1415. Here is the official FIA "2X" conversion formula calculator V rotory= V rotory = 1308mm³3⋅6 1308 mm³ 3 ⋅ 6 (SV)Swept volume ( S V ) Swept volume Published swept volume of a Wankel KKM (non-reciprocating) engine mm³ (n)rotor faces 6 This is the number of pistons in the engine. Results 2.616 cm³ (2,616cc's) 2.6 liters
    1
  1416. All Mazda 13B series engines have an actual true displacement of 3.9 liters using total swept volume to calculate displacement.
    1
  1417. NO, I'm not. These are facts. Mazda went bankrupt in the mid 1970's after its colossally failed attempt to launch an all Wankel engine power model line-up, Ford bought the failed Mazda company in a Japanese bankruptcy court sale in 1979.. Ford even controlled the CEO position at Mazda; The first American mazda CEO was; Henry Wallace (1996–1997, appointed by Ford Motor Company, first non-Japanese CEO of a Japanese automaker) James E. Miller (1997–1999) Mark Fields (1999–2002) Lewis Booth (2002–2003)
    1
  1418. Everyone knowledgeable in the automotive industry knows that Wankel engines (especially ones made by Mazda) were horribly unreliable and suffer from massive compression loss.
    1
  1419. The RX-8 was an ugly car with a gimmicky sedan body disguised as a coupe, its was unpopular and sold poorly as it gained a notoriously bad reputation for lacking power, premature engine failures and terrible fuel economy. The RX-8 was so unsuccessful Mazda discontinued the entire RX brand in 2009 and production ceased in 2012.
    1
  1420. The Wankel KKM engine was not designed by Felix Wankel... and he did not invent the rotary internal combustion engine either.
    1
  1421. From reading your comments it is very clear you know very little about the history of Mazda and nothing about Wankel engines or why they are obsolete today... I suggest you educate yourself before you attempt to speak intelligently on a topic that you clearly know nothing about.
    1
  1422. @Rui Cameira All Wankel engines are inherently unreliable... I don't know where you get your information? but they are all obsolete because of the notoriously bad reliability problems.
    1
  1423. @Rui Cameira There have been millions of aircraft mass produced using reciprocating engines... but there are no production aircraft using Wankel engines because they are simply too unreliable.
    1
  1424. @Rui Cameira Well, your information is simply wrong, Wankel engines are obsolete because they are inferior to reciprocating engines.
    1
  1425. @Rui Cameira You seem to be unaware that Mazda no longer makes Wankel engines... production ceased many years ago.
    1
  1426. @Rui Cameira Please name a single production passenger aircraft that uses a Wankel engine? Wankel engines are not used in aircraft because they are too unreliable.
    1
  1427. @Rui Cameira Mazda is no longer owned by Ford and they are still in business... they just don't make Wankel engines anymore because people do not want to buy new cars with unreliable engines.
    1
  1428. @Rui Cameira That is completely false, there are still many production and series built aircraft that use reciprocating engines and several manufacturers still produce reciprocating aircraft engines around the world.... they just don't make Wankel engines because they are too unreliable and completely inferior to reciprocating and gas turbine type engines.
    1
  1429. @Rui Cameira Companies like Cessna, Beechcraft, Diamond, Mooney and Cirrus still make aircraft with reciprocating piston engines, these engines are still used because they are more reliable and more efficient than Wankel engines. https://nbaa.org/business-aviation/business-aircraft/piston-engine-aircraft/
    1
  1430. @Rui Cameira WRONG! Felix Wankel only made engines for MOTORCYCLES he was employed by NSU MotorenWerkes GmbH. in the Motorcycle division.
    1
  1431. @Rui Cameira The engine designed by Felix Wankel has NEVER BEEN USED in any automobile or aircraft application... only one prototype of the DKM-54 is known to exist anywhere in the world.
    1
  1432. @Rui Cameira Most of your difficulties seems to be the result of your limited knowledge on this topic and a very bad attitude.
    1
  1433. @Rui Cameira The Wanke KKM engine design is not new technology, it was developed in 1957 and is now OBSOLETE technology... none of the original Wankel KKM licensee's still produce or even develop the Wankel engine... it was a huge commercial failure and even Mazda finally dropped the Wankel several years ago.
    1
  1434. @Rui Cameira Please tell us what U.S. Air Force jet aircraft were powered by a Wankel engines
    1
  1435. Each Mazda Renesis engine had over 235 moving and seal related parts... ironically its the dozens of tiny, fragile seal components that make them so unreliable... are the same parts people like to pretend are not there Lol!!!!
    1
  1436. Yes, lots of fragile parts are bad... that why these engines are obsolete now.
    1
  1437. MATH CLASS ERNIE... Wankel 20% efficient... Piston engine 40% efficient... that is a double the efficiency!
    1
  1438. Not made anymore, obsolete
    1
  1439. EV will remain a tiny niche market segment for wealthy yuppies and guilt ridden trust fund babies... the rest of us will still be driving ICE cars.
    1
  1440. The Wankel's high exhaust sound pressure is indicative of its lower efficiency
    1
  1441. +whalesong9991 But the Wankel is not a 2-stroke, its expansion and exhaust cycles are not combined or overlap significantly, it is a 4-stroke but compared to other more efficient 4-stroke designs its very loud.
    1
  1442. Nate Rist But the rotating assembly of a Wankel engine only turns at ONE THIRD of the crankshaft speed... only 3,000 rpm. It is an inferior design which is why it is now obsolete.
    1
  1443. +Justin Durand The facts are clear... Mazda's RX models continued to passed the toughest emissions standards in the world here in California... Mazda stopped making the RX, BECAUSE NO ONE WOULD BUY THEM.
    1
  1444. +Justin Durand Sales of the Mazda RX brand had been in STEADY DECLINE since 1986... with the brand no longer selling enough units to make a profit? Mazda discontinued the failing brand in June 2012 due to lack of sales.
    1
  1445. +Justin Durand The Mazda RX-8 not only earned a notoriously bad reputation for premature engine failures and poor reliability... but also delivered THE WORST fuel economy of any car in its class.
    1
  1446. Wankel engines are exactly like old analog, CRT television sets, they are obsolete because they are outdated and offer inferior performance.
    1
  1447. These engines was designed and manufactured by GRAUPNER GmbH. in Germany... the remaining parts and inventory was sold to O.S. when this engine was discontinued many years ago.
    1
  1448. Not true, the Graupner 49PI engine should always be run well rich of peak and a extremely rich AFR in the 4.5:1 to 5.5:1 range or they will quickly self destruct.
    1
  1449. +E85 13B All Wankel engines are 4-STROKE
    1
  1450. +yjjeeper1 You must have some reading comprehension problems son... do you want me to post it again but use smaller words?
    1
  1451. The Wankel not only generated lots of pollution, its wasted large amounts of fuel...
    1
  1452. Not a significant advantage... which is why these engines are obsolete now.
    1
  1453. shitty engine... no longer made thankfully.
    1
  1454. The war ended years ago... Wankel engines are obsolete now.
    1
  1455. Yes, Wankel engine were very inefficient and that is why they are obsolete now.
    1
  1456. Electric cars failed because of one man, Charles Kettering... in 1915 his invention killed off the EV.
    1
  1457. Hydrogen fuel has been tested with Wankel engines but offered very poor results. The Wankel engine cannot generate sufficient static compression ratio to efficiently burn hydrogen and the low fuel efficiency of the Wankel coupled with the very high cost of hydrogen makes it very uneconomical. Mazda produced a small fleet of prototype RX-8 cars for the Norwegian HyNor hydrogen vehicle program. The Mazdas were quickly rejected as preliminary test results showed they were the worst performing hydrogen vehicles tested.
    1
  1458. The Wankel is less efficient at extracting the heat energy provided from Hydrogen so fuel efficiency is REDUCED Hydrogen is no different than other fuel in terms of combustion efficiency... modern engines mass produced today all have high-swirl or quench-type combustion chamber. The fatal flaw in the Wankel is it simply cannot be adapted to this superior combustion technology.
    1
  1459. The Mazda RX-8 Hydrogen-RE proved that the Wankel engine delivers much LESS fuel efficiency when operating on hydrogen power and produced far greater emissions than reciprocating hydrogen fuel engines and hydrogen fuel cell vehicles.
    1
  1460. 4.9cc's. Fuel consumption? Its horrible....
    1
  1461. True, that is why Wankel engines are obsolete now
    1
  1462. @Darkwolf A17 That is a false urban myth, its nothing but wishful thinking by people that have no understanding of reliability problems that plagued the Wankel engine right up until it became obsolete in 2012. The NHTSA recall investigation of the extremely high number of premature failures of Mazda RX engines finally and completely dispelled this false myth forever. There is absolutely nothing that you can do to make these engines reliable... which is exactly why Mazda dropped them like a bad habit years ago.
    1
  1463. @Darkwolf A17 Complete and utter nonsense... your comment is filled with false urban myths, misinformation and outright ignorance regarding the development, history, inherent flaws and commercial failure of the Wankel KKM engine design.
    1
  1464. @Darkwolf A17 Absolutely and completely FALSE! The Mazda RX brand developed a well earned but notorious bad reputation for poor engine reliability, durability and service life. Sales of the RX brand had been in steady DECLINE since 1986 and sales of the RX-8 were a massive disappointment falling well short of what Mazda needed to recoup its development and production costs. sales were so low that the brand could no longer sustain itself as a commercial viable model or brand. False! The RX-8 continued to meet the World's STRICTEST emissions regulation right up until production was canceled due to lack of sales. The RX-8 met or exceeded BOTH EPA Tier2 Bin5 AND California's tough CARB ULEV II when production ceased in June 2012.
    1
  1465. @Darkwolf A17 You are obviously not very familiar with notorious history of the RX-8 and Mazda's serious problems with premature engine failures of its RX engines. Mazda recalled all RX-8s sold to date at the time of the recall issuance, and voluntarily reimbursed thousands of RX-8 owners who had paid for engine repairs and replacements out of pocket. Mazda was also forced to extended the engine core warranty as part of a class action lawsuit settlement brought against Mazda for initially trying to cover up the defective engine scandal by destroying customer satisfaction surveys from RX-8 buyers and for lying about the published horsepower specs.
    1
  1466. @Darkwolf A17 Those are all FALSE MYTHS... Hard starting and flooding problems are directly related symptoms of LOW COMPRESSION and DAMAGED ENGINE SEALS. Build-up of carbon and spark plug fouling is CAUSED by engine misfires due to low compression and engine damage. Redlining your engine is an OLD WIVES TALE that dates back to the days when Mazda RX cars were fitted with very poor quality carburetors which delivered poor mixture control and fuel delivery. Redlining your Fuel injected, Lambda feedback Renesis engine does NOT prevent this damage due to apex and side seal failure... it only temporarily masks the symptoms of low compression due to damaged seals. Bullshit! the RX-8 was sold in the United States and other countries were Ethanol blended fuels are available, Mazda did not use seals that were damaged by alcohol blended fuel which was approved by Mazda. MAZDA DOES NOT RECOMMEND PREMIXING oil with the fuel, THIS IS A MONUMENTALLY STUPID PRACTICE which will only causes further damage to your engine and its auxiliary components, sensors and emission control equipment. NEVER premix an RX-8... anyone that recommends premixing is not qualified to give advice on engine care and maintenance. Tampering or removing the Oil Metering Pump can also DESTROY an RX-8 engine in short order.
    1
  1467. @Darkwolf A17 "Wildly underdeveloped"????? The only thing underdeveloped is your knowledge of the development history of the Wankel KKM engine. 26 of the world's largest and best engine manufacturers and over 100 of the best universities and research institutes (including NASA and MIT) spent decades, millions of man hours and billions of dollar developing the Wankel engine design. Mercedes-Benz and and General Motors alone for example both spent over 100 million dollars a year on Wankel research and development. Ford Toyota Porsche Rolls-Royce Nissan Alfa Romeo American Motors (AMC) Citroën Suzuki Yamaha Kawasaki BSA Norton Hercules John Deere Ingersoll and Rand Fichtel & Sachs AG Yanmar Diesel Co. Ltd Daimler-Benz AG Deutz AG. MAN AG KRUPP AG IFA VEB Graupner Savkel Curtiss-Wright OMC Wankel-NSU GmbH. which became Audi.. Along with dozens of subsidiary companies and and partnership companies which combined represent BILLIONS of dollars in research and development besides what a tiny little Japanese automaker called Mazda ever did.
    1
  1468. @Darkwolf A17 That is NOT TRUE! You are obviously not qualified to speak intelligently regarding this subject and it appears that most of your very limited knowledge is either speculative, incorrect or based on misinformation.
    1
  1469. @Darkwolf A17 The NHTSA recall investigation of the extremely high number of consumer complaints found NO LINK between owner abuse or neglect... the investigations findings showed that RX-8 owners who provided fully documented service and inspection records suffered from the same premature engine failure problems. Mazda DID NOT challenge the investigations findings and voluntarily recalled its RX-8 models, testing and replacing tens of thousands of Renesis engines suffering from premature compression loss and seal failures.
    1
  1470. @Darkwolf A17 Mazda Overstates RX-8 Power The Daily Auto Insider: Mazda has revealed that it published an inaccurate horsepower rating for its new RX-8. https://www.roadandtrack.com/car-culture/a9684/mazda-overstates-rx-8-power/
    1
  1471. @Darkwolf A17 If only you were familiar with some real factual information about Wankel engines... most of your comments are based on myths, misinformation and outright lies. Your claims would be more credible if they actually sounded believable, the idea of a original RX-8 engine lasting 200,000 miles without major repairs or overhauls that has not suffered from seal damage and compression loss is not a likely or even plausible story and certainly not typical one. You are either the luckiest RX-8 owner in the world or you are just a liar.
    1
  1472. Ernie why doesn't your engine run????
    1
  1473. You should be more worried that the apex seal will fail and your engine floods.
    1
  1474. The Wankel engine was fatally flawed... Mazda dropped it like a bad habit in 2012.
    1
  1475. Fuel mixed with oil flows through the side port.
    1
  1476. These little RC versions run on Nitromethane not gasoline, what you see is unburnt fuel and oil.
    1
  1477. Yes, its a 4-stroke but its burns a lot more fuel than a normal reciprocating 4-stroke.
    1
  1478. Yeah, but it has only 1 mile range.
    1
  1479. Never going to happen... Wankel engines are obsolete technology.
    1
  1480. A very Interesting design, but ultimately a colossal commercial failure.
    1
  1481. WHERE IS IT???? Just more false rumors that never come true Hahaha!!! INSERT JACKASS TROLL REMARK BELOW
    1
  1482. The word piston is right in the name given by its inventor.... you probably don't understand the difference between a ROTOR and a PISTON... but you are probably not an engineer either.
    1
  1483. Yes, Wankel engines were horribly inefficient and dirty... its why they are obsolete now.
    1
  1484. It would still be very inefficient and unreliable.
    1
  1485. Flame licker engines are Internal Combustion
    1
  1486. Only the ignition source is outside the cylinder... combustion takes place INTERNALLY.
    1
  1487. There is NO SHOCK WAVE... Flame Propagation and Deflageration are Subsonic processes unless the engine is malfunctioning (pre-ignition/detonation) Continuous detonations will damage and destroy internal combustion engines and are to be avoided at all costs.
    1
  1488. The problem with the Wankel engine is if you change the shape it will no longer function, the geometry envelope is extremely limited.
    1
  1489. "Diesel engines are not more efficient than gas engines" REALLY???? Then why are the world's most fuel efficient engines DIESEL ENGINES???
    1
  1490. Actually Per Liter Diesel Fuel #2 and gasoline have almost the exact same Energy Density (about 35 Megajoules per/liter). Diesel engines offer significantly higher Carnot Cycle Thermal-Fuel efficiency than Otto Cycle engines... which is exactly why Diesel engines are more fuel efficient.
    1
  1491. If you really think that batteries can replace internal combustion engines??? Well, then you haven't done your homework... Because when you compare the Specific Energy density of liquid fuels to rechargeable batteries you quickly see the huge, very obvious problem with your theory...
    1
  1492. It wasn't an Mazda RX ad... they don't make them anymore.
    1
  1493. Today marks the 6th anniversary of the end of RX production, on Thursday June 21, 2012 at 4:30pm the final RX-8 car ever to be produced rolled off the assembly line, the last RX model to ever be produced by Mazda.
    1
  1494. +Geoff Willingham I don't know where you got your information Geoff? But its completely bogus, Wankel engines have been obsolete and discontinued from production for several years now. the last manufacturer was Mazda and they ceased production on June 22nd, 2012. They have never seen successful adaptation to any applications other than small sports cars, the Wankel is less efficient and higher BSFC which why it is not used in production aircraft or generators. Gas turbines offer on order of magnitude greater power-to-weight performance than the Wankel.
    1
  1495. +Geoff Willingham Mazda's board of directors cancelled all development of Wankel engines in May of 2009, Its CEO has consistently stated in official remarks that the company has no plans to return the Wankel engine back to production. The RX engine plant at Mazda's Ujina #2 facility was raised in 2013 to make way for a brand new Skyactiv-G assembly plant. Despite persistent false rumors found on the "clickbait" blogsites... Mazda has not confirmed any new prototype designs since 2008 and its last production engine was unveiled almost 23 years ago.
    1
  1496. Sounds like a waste of time and money...
    1
  1497. @Kaguya Houraisan Sounds like childish insults from an immature little troll...
    1
  1498. No. they self-destruct their engine housings... these are disposable engines.
    1
  1499. Engines that are not viable production units don't suffer apex seal failures because they never see real world use....
    1
  1500. The United States military solved its problems with apex seal failures... they no longer use Wankel engines.
    1
  1501. Its already supercharged
    1
  1502. @Robert844 Which Wankel??? Only the DKM-54 was a Rotary...Mazda and 25 other companies licensed the KKM-57 design which is not a rotary.
    1
  1503. @Robert844 Which Wankel are you referring to??? Only the DKM-54 is a Rotary... Its called a "Rotary" because the entire engine assembly ROTATES CONCENTRICALLY!
    1
  1504. @Robert844 You really don't know much about engines or Mazda do you kid? You sound very naive, like a complete amateur.
    1
  1505. @Robert844 Son, its very clear now that you would recognize a Rotary engine if one was dropped on your foot! Stay in school and study hard if you want to talk shop with the big boys... now run along kid.
    1
  1506. @Robert844 That is right son... to me you are nothing but a dumb kid that doesn't know his head from his ass... or the difference between a Wankel and a Rotary.
    1
  1507. The Wankel engine is dead, Mazda ceased development of production Wankel engines back in May 2009.
    1
  1508. +Owen racing Mazda only sells reciprocating engines since 2012... the Wankel engine was permanently discontinued because new car buyers refused to buy the anymore.
    1
  1509. Wankel engines are completely obsolete in the automobile and engine manufacturing industries... you would have to be very gullible and naive to believe these inferior engines will ever come back... this is simply never going to happen for obvious reasons.
    1
  1510. Mazda CEO said NO, they have absolutely no plans to bring back the Wankel engine and there is zero evidence to suggest this policy has changed apart from fake rumors started by amateur bloggers as "clickbait" headlines.
    1
  1511. The Wankel engine cannot support efficient use direct injection due to its horribly inefficient combustion chamber and limited static compression ratio. The Wankel is a obsolete concept due to the very serious inherent flaws in its basic fundamental design.
    1
  1512. Without cars that actually sell... you have no car company, Mazda has already been bankrupt 3 times... they may just get swallowed up by Toyota or Honda next time and cease to exist.
    1
  1513. Mazda only sells cars with reciprocating engines... they ceased all development of production Wankel engines in May 2009.
    1
  1514. Nothing but wishful thinking and false hope... although laser ignition has been tested in laboratories, a practical system still does not yet exist.... and if it did? It would be equally beneficial to both orbiting reciprocating designs completely negating any net gain in efficiency over reciprocating engines.... so dream on.
    1
  1515. Throw it in the trash... where it belongs!
    1
  1516. Hey i just noticed that this guy ( ***ERNIE BRINK ROTARY***) has been promoting an infamous vaporware scam company called Freedom/Moller International that was sued by the SEC for fraud and filed bankruptcy after taking millions in investor's cash and never producing a single thing, A cursory look at his ramblings shows me he couldn't engineer his way out of a wet paper bag! LMAO.
    1
  1517. Tesla quality is already low.
    1
  1518. Tesla kicks butt... except for making a profit selling cars.
    1
  1519. WHO is Alyssa Milano???
    1
  1520. Wankel engines are no longer made because they are very dirty and inefficient.
    1
  1521. The Wankel KKM is technically not a rotary type engine, the now defunct "Mazda Rotary®" brand has become patois, "street slang" for the Wankel "KKM" KKM is an acronym for Kreiskolbenmotoren which means "Orbiting Piston Motor" in German.
    1
  1522. +JP Onefourseven A Rotary type internal combustion engine Always Means "an engine where the crankshaft stays still and the rest of the engine rotates around it." There were 2 versions of the Wankel engine. one was a Rotary... This one is not.
    1
  1523. More parts than a comparable 2-stroke, the Wankel had a lot of design flaws that made it unable to compete with reciprocating engines.
    1
  1524. Yes, the Wankel is obsolete because of it's terrible combustion and fuel efficiency.
    1
  1525. Yes, the Wankel is obsolete because of it's terrible combustion and fuel efficiency.
    1
  1526. Ernie Brink why does your engine not run at all???
    1
  1527. They are so unreliable they are not used in aircraft. and automotive manufacturers abandoned them years ago.
    1
  1528. Mazda doesn't make Wankel engines anymore... no one does.
    1
  1529. Its a 4-stroke engine
    1
  1530. OK then, Any questions?
    1
  1531. Taylor, All Wankel engines have a PISTON, Its right in the name its inventors gave it...
    1
  1532. Wikipedia is not an accredited, peer-reviewed engineering journal or publication... A more accurate description is; *In the 4-stroke all four cycles occur separately. In the 2-stroke some of the cycles occur Simultaneously and are Combined or overlapping significantly.
    1
  1533. Taylor, as I said... Don't confuse Wankel KKM engines with Rotary Type engines...they are completely different concepts (and you sound uneducated when you use slang terms).
    1
  1534. Are you familiar with "Winton" type engines? 2-strokes with poppet exhaust valves? Or "Knight" type engines? 4-strokes with no poppet valves?
    1
  1535. Do you know what a Millet type Rotary engine is? aka "Monosoupape" Rotary engine, 4-stroke with exhaust poppet valves and crankcase transfer intake ports???
    1
  1536. Not at all Taylor, every engineer understands that all Wankel engines are 4-stroke... this matter is not debated among scholars in the field and was very clear to Dr. Hanns Paschke and Walter Froede that created the KKM engine.
    1
  1537. OK Taylor, you seem like a smart kid (you ask good questions) Here is the deal, the Wankel engine has a PISTON which Both reciprocates and orbits in a planetary motion eg; a Mazda 13b engine for an example has two pistons (often incorrectly called rotors) and a crankshaft with a 15mm throw which produces a 30mm STROKE every revolution. Any questions? Once you understand the basic fundamental concept of how the KKM operates you can leap beyond the confusion regarding its operating principle which is a 4-stroke just like the Otto engine.
    1
  1538. Hey Taylor, lets lay the confusion to rest... Here is a highly respected, peer-reviewed automotive engineering reference source from _Encyclopedia of Automotive Engineering: Engines - fundamentals, Volume 1, Part 1 Chapter 10 Page 532, Section; 2.2.3.2 quote; "Wankel engines work with the four-stroke principle" https://books.google.com/books?id=ANfdCgAAQBAJ&pg=PA532&lpg=PA532&dq=wankel+4+stroke&source=bl&ots=gzrnDiXhUe&sig=wVwxnnTy68GEfgnIl6orujQSUgI&hl=en&sa=X&ved=0ahUKEwiq7aKp9Z7ZAhVP42MKHQRAAsc4FBDoAQg6MAM#v=onepage&q=wankel%204%20stroke&f=false
    1
  1539. Here is a good video of what a rotary engine is. https://www.youtube.com/watch?v=FvHrbkYEn0k&list=PLmhSXyOMooSlhNQZShFYxRRiz2pB_jl-g&t=0s&index=6
    1
  1540. Here is an example of an automotive Rotary engine. https://www.youtube.com/watch?v=tZmd7k33JWE&index=2&list=PLmhSXyOMooSlhNQZShFYxRRiz2pB_jl-g
    1
  1541. Here is a video of the Megola Rotary engine motorcycles.. BTW This is the very same bike that inspired Felix Wankel to design his first Rotary engine... and later the Wankel DKM-54 which also used the rotary layout. https://www.youtube.com/watch?v=c4Cq49IDfOc&list=PLmhSXyOMooSlhNQZShFYxRRiz2pB_jl-g&index=10
    1
  1542. @ Glen Trurney That is incorrect, each of the 3 sides completes ALL FOUR CYCLES... this requires 1080° of crankshaft rotation rather than the 720° in the reciprocating 4-Stroke Otto engine. WHAT ABOUT UNIFLOW 2-STROKES???? these 2-stroke do not comply with your bizarre theories. Contrary to your theory... All modern Mazda Wankel engines use the exact same type of hydro-static crankshaft journal bearings as any of modern car... Your typical Loop-scavenged 2-stroke engine uses "frictionless" ball or roller bearing..
    1
  1543. @Glen Turney Complete and utter nonsense kid! You clearly do not understand the basic fundamental criteria that define the 2-Stroke or 4-Stroke operating principles... I suggest you go to a proper school and learn something instead of posting ridiculous half-baked theories and making a fool of yourself.
    1
  1544. @DeZinc abecx was only pointing out the obvious... that Wankel engines are indeed incredibly inefficient and dirty engines.
    1
  1545. @christian robertson Poor Danny doesn't know anything about engines...
    1
  1546. @EarthSurferUSA The fatal flaw in all the Wankel KKM designs is not high HC emissions...Yes, its true that much of the fuel gets wasted out the exhaust port in the Wankel but its biggest flaw is most of the horsepower is also wasted out the exhaust port too!
    1
  1547. @EarthSurferUSA OMC (Evinrude) and Sachs were both original Wankel KKM-57 licensee's. Sachs, OMC and NSU manufactured several Wankel engines that were sold in various brands of snow machines but none were commercially successful or very popular. By the late 1970's these engine were all discontinued due to poor sales.
    1
  1548. @Flyingdutchy33 Have you been to the local Mazda dealer lately??? LOL!!!!!
    1
  1549. @Flyingdutchy33 I have never ruined any engine... I have also never owned a Mazda engine... you have to be stupid to buy one of their unreliable engines.
    1
  1550. @Flyingdutchy33 If you actually knew anything about Wankel engines you would have been ripped off by so many shops... All Wankel engines are 4 STROKE dummy!
    1
  1551. @Flyingdutchy33 Are you really that ignorant to think the Wankel is a "1 cycle"??? please explain how a 1-cycle would work?
    1
  1552. @Flyingdutchy33 Apparently you really enjoy being made a fool... I'm only happy to oblige you.
    1
  1553. Ernie, why doesn't your engine run????
    1
  1554. Ernie, (and xke xke are the same person) Please tell us why doesn't your engine run????
    1
  1555. @Taylor Latch Wankel KKM engines are ALL 4-strokes DUMBASSS!!!
    1
  1556. This month marks the 10 year anniversary of Mazda's decision to kill-off the RX-8, the entire RX brand and cancel further development of production Wankel engines... its been a quarter of a century now since Mazda unveiled its last new production Wankel engine.
    1
  1557. The Eccentric-crankshaft works no differently than any of type of crankshaft... it just has a shorter stroke and is more rigid to deal with the massive stress cause by the lack of internal balance in the Wankel engine.
    1
  1558. Not really, it uses the exact same types of bearings that other crankshafts use, not different at all in that respect... Connects to the PISTON specifically... the term "rotor" is a slang, an incorrect translation or proprietary term applicable only to certain defunct brands of Wankel engines.
    1
  1559. Unfortunately it is a deeply flawed design and its flaws are inherent to the very basic fundamental geometry that allows it to work in the first place.. paint your self into a corner? its gonna be messy.
    1
  1560. Who would ever guess Ninja was so deep...?
    1
  1561. @Bailey Knapp Wankel engines only flood when the seal wear-out or break...
    1
  1562. @Dominique Buzon The model 49PI sold poorly and was discontinued because it was heavier, more expensive and much less reliable than comparable reciprocating 2-cycle models.
    1
  1563. @fuck anime Childish insults won't make you look very smart and only make you look like a very immature little troll.
    1
  1564. @fuck anime The truth is Wankel engines are horribly unreliable and are inferior overall to reciprocating, they are obsolete because no longer offer any significant advantages.
    1
  1565. @fuck anime Wankel engines are less reliable and have significantly shorter service life compared to the reciprocating engines they failed to replace. This fact is irrefutable... Graupner GmbH. like Norton and Mazda all abandoned production of this design because it was a commercial failure.
    1
  1566. Yes, and the Wankel rejects most of what little heat energy is generated from the fuel that is burned.
    1
  1567. Hey i just noticed that this guy ( ***ERNIE BRINK ROTARY***) has been promoting an infamous vaporware scam company called Freedom/Moller International that was sued by the SEC for fraud and filed bankruptcy after taking millions in investor's cash and never producing a single thing, A cursory look at his ramblings shows me he couldn't engineer his way out of a wet paper bag! LMAO.
    1
  1568. Mazda's Skyactiv-X is a reciprocating 4-cylinder!!! https://www2.mazda.com/en/next-generation/technology/
    1
  1569. Very cool for a obsolete engine design.
    1
  1570. Not everyone can have good taste... someone has to mop floors and drive a Mazda.
    1
  1571. Nah, they were always very overrated, mostly because so few people really know much about them.
    1
  1572. Hahahaha!!!!
    1
  1573. Not made anymore, there are no engine manufacturers making Wankel engines anymore... they are obsolete now.
    1
  1574. Why?
    1
  1575. You don't actually know anything about engineering at all do you?
    1
  1576. They were made as RC engines but discontinued because 2-strokes work better.
    1
  1577. Amen Gun Jesus... you are our beloved savior.
    1
  1578. Flooding and hard starting are typical symptoms of premature apex seal failure... indeed, its not a very good engine... Mazda had an over 50% failure rate.
    1
  1579. Ernie! WHY? doesn't your engine run????
    1
  1580. @Ben Fennel Wrong doktorbimmer... that other guy is "dokterbimmer" and is locked up in a mental hospital.
    1
  1581. @Ben Fennell I do, that other guy is a nut job! he has like a dozen different usernames too!.
    1
  1582. @Ben Fennell "Ernie Brink" (aka Anthony Campbell, Lisa Giannini, No Vision Blinders, dokterbimmer, xke xke, ernie brink hemi rotary, is one of the craziest people on the internet. My advice is just ignore this bat shit cray cray!
    1
  1583. The Wankel engine is the least efficient internal combustion engine produced in the 21st century... of course they are obsolete now.
    1
  1584. Ernie Brink! Why doesn't your engine run????
    1
  1585. Ernie Brink rotary hemi... EPIC FAILURE
    1
  1586. @JBC Imagine how much faster the apex seals would fail...
    1
  1587. Hot exhaust = Low efficiency
    1
  1588. @David Thompson Although flooding is a symptom of apex seal damage in Wankel engines... in this case the excess fuel is not unusual given the extremely rich AFR this engine requires to run and the horrible combustion efficiency of the Wankel's chamber design.
    1
  1589. Imitation is the greatest form of flattery...
    1
  1590. @blueRC Thats right! This is a WANKEL not a rotary. No, not true, nitro fuel, glow ignition Wankel engines require an extremely rich AFR, much richer that a reciprocating engine. This is true of all Wankel type engines and one of the main reasons why they are obsolete.
    1
  1591. @blueRC Most production Wankel engines have dual, sequential ignition. The single, un-timed glow ignition is very poorly suited to the Wankel engine and as a direct result misfires and incomplete combustion occurs.
    1
  1592. @blueRC Graupner GmbH. eventually abandoned the Wankel engine completely as there is no practical way to deal with its very inefficient combustion chamber design, special ignition requirements, low thermal efficiency and overall poor reliability. The Wankel engine has been obsolete for many years.
    1
  1593. WOW! Best comments on the entire video. cheers!
    1
  1594. Dead technology... not even Mazda makes these horrible engines anymore.
    1
  1595. Unfortunately is was more complex, expensive and less reliable than 2-stroke reciprocating RC motors which is why these Wankel engines were discontinued years ago.
    1
  1596. Graupner discontinued these troublesome, difficult to sell engines years ago. they can be found sometimes used on Ebay for around $500 USD.
    1
  1597. Mazda discontinued the entire RX brand 6 years ago... the Wankel engine is obsolete now.
    1
  1598. Major reliability problems plagued all the RX models but the FD and RX-8 are particularly troubled engines that simply do not last and are expensive engines to replace now that all production of Wankel engines at Mazda ceased several years ago.
    1
  1599. Tesla has a problem because even with up to $10,000 dollars in subsidies per car they are losing money on every car sold and people just are not buying them... growth of the EV segment has stagnated.
    1
  1600. The Wankel engine is a 4-stroke.
    1
  1601. Then why don't they make any???
    1
  1602. @MysticRixel They Were the worst selling RX-7 model of all time. a major flop in Mazda biggest markets.
    1
  1603. Well, the tendency for these engines to quickly lose power and self destruct is one thing not to love... and the reason why they are no longer made.
    1
  1604. Wankel engines are no longer manufactured in series mass production anywhere in the world today... this obsolete design is no longer used in any production applications... it is now the sole domain of crackpots and con-men.
    1
  1605. They have to submit there EPA test results for the car as it will be delivered to customers in the US before they can make any mileage claims.
    1
  1606. Mazda just announced The 2.0 liter Skyactiv-X Mazda3 delivers 43.6 mpg on the new European WLTP drive cycle test. No EPA ratings yet but they could be near the 50 MPG mark.
    1
  1607. How would you get the compression and power strokes to work???
    1
  1608. Hahaha Yeah! Lol! Its hard to imagine people used to believe that too!
    1
  1609. SidewaysGts is one of those angry little trolls you hear so much about.
    1
  1610. Mazda discontinued Wankel engines because people don't buy them... Sales of RX models had steadily declined since 1986 and the last 2 RX models failed to sell enough units to justify production.
    1
  1611. And now he proves he is an angry little troll!
    1
  1612. This month marks the 10 year anniversary of Mazda's decision to kill-off the RX-8, the entire RX brand and cancel further development of production Wankel engines... its been a quarter of a century now since Mazda unveiled a new production Wankel engine.
    1
  1613. The Toyota 2000GT is still way better looking.
    1
  1614. This engine was manufactured by Graupner GmbH. in Germany
    1
  1615. The Suzuki RE-5 was a huge flop that nearly bankrupted the company... most of the bikes that were built never sold and were later returned to the factory to crushed.
    1
  1616. Mazda now taking orders for the new Skyaciv-X 2.0 liter 4-cylinder equipped Mazda3 models with delivery for September 2019. https://europe.autonews.com/automakers/mazda-opens-orders-mazda3-fuel-saving-skyactiv-x-tech
    1
  1617. Car collectors generally avoid Mazdas... they are not highly valued in the collector market.
    1
  1618. @Skrt Reynolds Only to the amateurs with no taste.
    1
  1619. @Skrt Reynolds Are you intimidated by people more knowledgeable on topic, like automotive professionals and automotive experts???
    1
  1620. Like you know anything about Ferraris...
    1
  1621. @Ivan Vukoja Anfänger...
    1
  1622. @Ivan Vukoja You are not very smart son, and completely ineffectual as a troll... perhaps you should go back to children's video games or troll elsewhere because you don't intimidate me in the slightest.
    1
  1623. @Ivan Vukoja No, you are just a childish troll that knows nothing about cars... You do not intimidate me... you are an ineffectual troll.
    1
  1624. @Ivan Vukoja Just the facts here kid... you clearly know nothing about cars...
    1
  1625. @Ivan Vukoja Just more than you son...
    1
  1626. You meant to say something old? as in historical... the Wankel is an obsolete technology now.
    1
  1627. How would you achieve the compression and power strokes with 6 sides?
    1
  1628. Its not... which is why Wankel engines are obsolete today
    1
  1629. The Wankel design is very inefficient in terms of mechanical conversion due to the inherent flaw in its internal geometry that makes it work, so the torque characteristics will always be very poor... its why Wankel engines were never used on heavy vehicles... they just cannot develop useful torque like a reciprocating engine can.
    1
  1630. Good questions! Unlike the reciprocating engine where the Bore-to-Stroke Ratio can be varied and optimized for maximum torque output. The Wankel's geometric relationship between the diameter of the piston(rotor) and the stroke (offset of the eccentric-cranckshaft lobe) is limited to a vary narrow envelope. The diameter of the Piston(rotor) arc is also limited by the linear speed of the apex seal, effective lowering the rpm as diameter increases and increases the moment. the width of the Piston(rotor) increase the mass and thus moment which both adversely effect balance. Mercedes-Benz exhaustively tested direct fuel injection 1967-1970 with the M950F the most powerful Wankel engine ever built at the time, it had an absolutely horrible brake specific fuel consumption and did little to improve exhaust emissions. The Wankel's geometry envelope also effectively limits the static compression ratio that is required to effectively utilize the advantages of stratified charge combustion offered by GDI.
    1
  1631. Well, it is the very unique geometry ratios that allows the Wankel engine to function in the first place... alter these geometric relationships and the engine will no longer function as an engine. The epicyclic gears maintain the critical 3:1 ratio between the eccentric-crankshaft and the Piston, it also creates the 4-strokes of the Otto Cycle from the 3-sided piston(rotor).. (the Mazda 13b has a 30mm stroke generated by the 15mm offset of the journal lobe) .. if you change the gear ratios the engine ceases to function correctly. The piston contacts eccentric lobe and is also connected to the housing by the gear mesh... creating an "arm" which is analogous to the "connecting rod" in a reciprocating piston engine.
    1
  1632. In a typical reciprocating engine there is a Positive Rod-to-Stroke Ratio (ranging from 1.4:1 to 2.2) the length of the connecting rod is always longer to the length of the crankshaft offset and generates a mechanical advantage (just like a simple lever) but in the Wankel, the ratio is fixed and in a Negative ratio, working against a mechanical disadvantage this critical flaw in its basic design dates back to the very origins of the Wankel concept as a supercharger (pump) in the early 1950's where the shaft is driven by an external source... converting rotational force into reciprocating motion, exactly the opposite of an engine.
    1
  1633. The Graupner GmbH. (O.S.) 49 PI engine does not have a spark plug... it uses glow ignition... with no timing there is no advantage to having multiple plugs. It only produces 1 horsepower, 2-strokes are more powerful in RC applications.
    1
  1634. The Wankel engine was extensively and exhaustively researched and developed by 26 of the worlds largest and best engine manufacturers in the world and over 100 universities and research institutes for nearly two decades. The engineering community has reached a consensus, that the Wankel concept is just inherently inferior and offers no further development potential... which is why the Wankel engine is today obsolete, no longer in production anywhere in the world today by any legitimate engine manufacturer.
    1
  1635. Yes, the race to market the Wankel engine was a colossal financial failure, companies like General Motors and Mercedes-Benz spending as much a $10 million USD per month developing the Wankel engine and never sold a single car with one. Companies like Mazda and Norton and went bankrupt trying to sell them.
    1
  1636. Mazda is still in business... they just don't make obsolete engines like the Wankel anymore... the Wankel engine is dead.
    1
  1637. There is nothing fun about owning a car with an unreliable engine, that why people stopped buying them.
    1
  1638. Wankel engines produces very poor torque output and have been surpassed by reciprocating engines in both power and high rpm capability. The is no joy when a Wankel engine floods or fails to start due to damaged seals and low compression... bad design, fatally flawed.
    1
  1639. Its really not related to materials at all, the fatal flaw is related to the shape and geometry of the Wankel engine... round cylinders/pistons are superior due to the more even rate of thermal expansion which cannot be solved in the Wankel design. Graphene is not going to bring the Wankel engine back.
    1
  1640. Wankel engines are obsolete now, because they are simply inferior to reciprocating engines. There are no longer developed or produced by any legitimate engine manufacturers because engineers understand that the Wankel engines reached the end of its development potential.
    1
  1641. No longer made, Wankel engines are obsolete.
    1
  1642. The Wankel is sort of a joke.... it was a colossal failure.
    1
  1643. Not big enough... no torque
    1
  1644. This Wankel engine in this video is a Graupner 49PI and had a displacement of just 4.9 cc's. They were sold for a few years as RC plane engines but they were not popular and were eventually discontinued.
    1
  1645. Wankel engines have been discontinued in RC products because the reciprocating 2-strokes are cheaper, more powerful and reliable... and reciprocating 4-strokes are becoming more popular because they are cleaner and more fuel efficient and generate more torque.
    1
  1646. The market also offers other much better alternative power options like like battery-electric and gas turbine engines for RC models.
    1
  1647. Indeed, the Whittle W.B.2/700 engine never produced the specified thrust required to go supersonic and never successfully completed a full power test without damage... Whittle abandoned the project just before he was forced out of his own company Power Jets, and exiled to drug rehab in the U.S. The UK government had no choice but to cancel both programs.
    1
  1648. @Ben Stevens If pre-mixings works as you claim? Why doesn't Mazda recommend it? Why have Mazda engineers chosen Metered Oil Injection on all its production since the 12A???
    1
  1649. @Ben Stevens Can you tell us what very important negative issues that are related to using pre-mixing instead of oil injection. Or are you suggesting pre-mixing has no down sides? Please explain how pre-mixing can extend engine life when there is no factual proof that it does... pre-mixing actually damages the engine and shortens engine life, it reduces power and efficiency when compared to oil injection... Do you understand why? Or are you just blindly repeating what some unqualified or inexperienced person has claimed?
    1
  1650. @Ben Stevens Why would you use motor oil intended for 2-stroke engines in an engine like the Wankel KKM which is a 4-stroke? You are aware that 2-stroke and 4-stroke engines have very different operating principles and lubrication requirements that also require special lubrication specifications... Are you aware that many of these specifications are not interchangeable or meet manufacturer specifications???
    1
  1651. @Ben Stevens WRONG! Mazda RECOMMENDS any of the oil weights listed in the operators manual found in you TEMPERATURE/VISCOSITY INDEX CHART This may vary by the region the vehicle was first sold.* The CORRECT ANSWER; Mazda recommends oil with an API rating of 'SL' or EC rating of 'GF3' any oil with rating that has a viscosity that matches your climate and temperature range found in the chart IS APPROVED.
    1
  1652. @Ben Stevens WHAT 2-stroke pre-mix oil you are you using that meets API SL/ EC GF3???? Please answer???
    1
  1653. Jean-Yves Laliberté Ben is no teacher.. but he is about to get "schooled"
    1
  1654. @Jean-Yves Laliberté You do not want to ever mix oil into your gas tank unless the fuel system and engine are designed for this. Adding additional oil into the combustion chamber to extend engine life has become a popular myth but there is in fact no advantages to introducing more oil than is injected by the Oil Metering Pump... the simple fact is too much oil is just as bad as too little oil. Pre-mixing causes more harm and has no benefits.
    1
  1655. @Ben Stevens Then I feel very sorry for your students... Just more than you about pre-mixing Mazda has never sold a Rotary engine son, it sold Wankel KKM engines under the "Mazda Rotary®" brand name until 2012.
    1
  1656. @Ben Stevens Klotz BēNOL®??? This product is not recommended for any 4-stroke engine including the Wankel. Its only recommended for ratios up to 50:1 and is not compatible with petroleum oil either ITS API RATING IS ONLY 'SA' The LOWEST API RATING and does NOT meet Mazda specifications. It does not meet ANY EC ratings
    1
  1657. @Ben Stevens According to the API, the term "Synthetic" is a meaningless marketing term... it only recognizes 2 types of base stocks based on their lubricity index.
    1
  1658. @Ben Stevens There are 5 classes of motor oil base stocks that are sold under the marketing term "Synthetic" motor oil THREE of them contain mostly petroleum base stocks... CAN YOU NAME THE OTHER TWO BASE STOCKS????
    1
  1659. @Ben Stevens I can read owners manuals AND PRODUCT LABELS Sounds like most of what you know about motor comes from advertisements and internet rumors.
    1
  1660. @Jean-Yves Laliberté No worries my good sir, you are a scholar and a gentlemen... but it seems are young, naive lad Ben here needs to find himself post to bite down on quick before he digs himself in even deeper.
    1
  1661. @Ben Stevens Only the ignorant ones pre-mix... Thank you for proving my point son! Cheers!
    1
  1662. @Ben Stevens And the API American Petroleum Institute publishes empirical data based on proven facts. You can't even read a product label son.
    1
  1663. @Ben Stevens If you cannot offer any facts to support your false claims??? then opinions are all you have son.
    1
  1664. @Ben Stevens Pre-mixing only causes harm, it is not recommended by Mazda for some very good reasons that you seem completely oblivious of. Yes it is, if the OMP is delivering the correct amount than your OMP is installed incorrectly, damaged or needs service. There is no advantage to adding more oil than is needed. Pre-mixing causes carbon deposits and lowers the effective octane rating causing damage to the apex and side seals, spark plugs, lambda sensors and emissions equipment. Only among those who are not knowledgeable on this topic, the engineers at Mazda and lubricant manufacturers have no doubts.
    1
  1665. @Ben Stevens I'm also entitled to call-out people giving bad advice on topics they do not understand... you should be ashamed of yourself kid, what you are doing is wrong.
    1
  1666. @Ben Stevens Son, if you just read the manual and put the right oil in the right hole??? The OMP won't need any help... if your engine fails due to lack of lubrication??? It because you didn't check the oil level often enough.
    1
  1667. @Ben Stevens The primary failure mode in Wankel engines is NOT lack of lubrication... this is another false urban myth spread by novice and amateur individuals that have no formal education or experience in field of automotive engineering or engine design. Apex seals fail as a direct result of ablative and brisance damage due to erratic and uncontrolled flame propagation and deflageration in the combustion chamber.
    1
  1668. @Ben Stevens What's the matter kid? Cat got your tongue? Without any facts you can't back-up your false claims.
    1
  1669. @Ben Stevens If you are interested in learning more about Wankel engines or why you don't pre-mix the ones made by Mazda? I would be very happy to give you some additional facts and information... that way you won't keep making a fool of yourself. Cheers!
    1
  1670. @Ben Stevens WHERE ARE YOUR FACTS KID???? Gonna have to do better than that son... sounds like you are a SORE LOSER now????
    1
  1671. @Ben Stevens Hey Ben! You put the oil in the ENGINE! Not the gas tank DUMMY!
    1
  1672. @Ben Stevens Don't believe me??? CHECK YOUR OWNERS MANUAL... It says put GASOLINE in the Fuel Tank and OIL IN THE ENGINE!!!!! Lol!!!!
    1
  1673. Mazda discontinued the RX-7... 17 years ago and the entire RX brand including all Wankel engine production in June 2012.
    1
  1674. The 49PI engine was Graupner GmbH. designed and manufactured until the rights were sold to O.S. (Graupner was one of the original Wankel KKM licensee's in the 1960's.)
    1
  1675. Wankel engines suck... that is why they don't sell them anymore.
    1
  1676. R.I.P. Wankel engine 1964 - 2012.
    1
  1677. R.I.P. Rust in Peace Wankel engine 1964 - 2012
    1
  1678. The problem was it does not stay sealed for very long... compression loss leads to lost power and efficiency... it also causes hard starting and flooding of the spark plugs... these engines were never very reliable or very popular, they were discontinued by all the manufacturers several years ago... they are no longer made anywhere today.
    1
  1679. @Axel bodat Factory supported teams (like Mazda) do not race engines that the manufacturer no longer sells or is obsolete... that makes no logical sense whatsoever.
    1
  1680. @Axel bodat WRONG! The FIA announced the WSC series would change to 3.5 liter engines at the end of the 1989 season... Mazda had already signed a deal to use the Jaguar chassis and the Judd V-10 BEFORE the race at Sarthe in June... FALSE MYTH BUSTED!
    1
  1681. @Axel bodat You don't know much about Mazda, and what little you do know is completely wrong... you look like a fool right now kid.
    1
  1682. @Axel bodat Neither IndyCar series or the FIA ever banned Wankel engines... this bullshit urban myth has been busted kid!
    1
  1683. @Axel bodat Wankel engines are dead because they are inherently inferior to reciprocating technology and people vote with there wallets... no one wants to pay the same or more for an inferior engine.
    1
  1684. @Petreu Interesting theories you have proposed... but the factual evidence would prove otherwise. The Wankel engine is very poorly suited to aircraft applications, it was a complete and total failure in the commercial and military aircraft industry and not a single plane has ever been mass produced with a Wankel engine. Sachs and OMC manufactured engines for several snowmobile brands in the 1970s, unfortunately they all performed and sold very poorly and were discontinued after just a few years.
    1
  1685. @Petreu Nothing wastes fuel like the Wankel engine did... the Chevrolet Corvette C-7 developed twice the power of the RX-8, weighed more and still had better fuel economy...
    1
  1686. @anon metalis You have got your percentages inverted, 75-80% of the liquid is FUEL and 20-25% IS OIL. Some of what you see is oil, the rest is indeed unburt fuel.
    1
  1687. @twistedyogert How would you know? Do you even know what the recommended AFR is for a Graupner 49 PI???
    1
  1688. @twistedyogert Of course it needed apex seals... probably needed a lot more parts too...
    1
  1689. @14_velnio_bažnyčia What is the matter kid? Can't handle the truth???
    1
  1690. @14_velnio_bažnyčia Maybe you should go troll somewhere else...
    1
  1691. @Ghosts1912 Its not coming back... Wankel engines are obsolete now.
    1
  1692. @Ghosts1912 No they didn't, Mazda's board of directors permanently cancelled all further development of production Wankel engines in May 2009.
    1
  1693. @Jin Song If that was true? Why is the Wankel engine obsolete now??? Not a single legitimate engine manufacturer anywhere in the world produces the Wankel engine is series mass production for any applications
    1
  1694. @Jin Song Your statement is entirely inconsequential to what is happening in the engine manufacturing industry right now... over 100 million new cars were sold last year... NOT ONE OF THEM was equipped with a Wankel engine. Wankel engines are obsolete technology and not even Mazda makes them anymore... Not really, Wankel engine shops are a dying breed... with fewer and fewer Wankel powered cars left there is not much of a specialty market left anymore. You will always be able to custom build one-off and replica engines that have been long since obsolete... it just takes lot of money... with enough cash you can have any discontinued part or engine reproduced or custom made... You can still buy a brand new reproduction flat-head engines for a Ford Model T... they still even make steam engines and horse drawn buggies... this does not change the fact that all of these technologies are completely obsolete.
    1
  1695. @Stanley O The engine is not flooded, these engines require an extremely rich mixture to start or run...
    1
  1696. That is a very naive statement... EVs have been around for over 130 years and have never been threat to Internal Combustion vehicles... and they still are not a threat even today.
    1
  1697. Electric cars have been around for over 130 years... and they are still no threat to internal combustion cars... BEVs represent less than 1% of the total global fleet and market share remains stagnant...
    1
  1698. R.I.P. Wankel engine 1964 - 2012
    1
  1699. You heard wrong, Mazda and Toyota lost their bid to include range extenders to meet the new ZEV regulations
    1
  1700. https://jalopnik.com/the-rotary-engine-sucks-1773174001 Jalopnik Says Rotary Engine Sucks!!!
    1
  1701. Mazda's Skyactiv-X is a reciprocating 4-cylinder!!! https://www2.mazda.com/en/next-generation/technology/
    1
  1702. I know, you have to see the irony in that as most RX owner are also gay.
    1
  1703. Even Mazda has forgotten the 787b... Now that Toyota has a Le Mans win now too!
    1
  1704. Its not, its a Wankel KKM type engine manufactured by Graupner GmbH
    1
  1705. Avoid this obsolete junk! engines size of a large V-6, power of a small inline 4 and the fuel consumption of a V-10!!!
    1
  1706. Good comment, the Wankel was plagued by several major flaws related to combustion efficiency and heat rejection that cannot be fixed... and so now the design is no longer used in the engine manufacturing industry.
    1
  1707. All Wankel engines use the 4-stroke operating principle.
    1
  1708. All Wankel engines are 4-stroke and use the exact same 4-stroke operating principle as an Otto engine... just laid-out very differently.
    1
  1709. Yeah, but it arrives to the track on a trailer because it does not have enough range...
    1
  1710. Graupner GmbH. discontinued these engines years ago... Wankel engines are no longer in production anywhere... obsolete.
    1
  1711. There are many companies making 2-stroke and 4-stroke reciprocating engines for RC applications here are a few: Fuji Saito Carr Precision Zenoah MVVS O.S. ZDZ 3W BME Davis Diesel Development Enya RCV Y.S. Fox Laser JBA MECOA Nelson SuperTigre Magnum Thunder Tiger FPE Evolution OPS Suevia Zeus Irvine HP HB Webra
    1
  1712. Mazda really is an under-performing company, they seem to always invest large sums of cash into engine technologies that end up failing to catch on.
    1
  1713. +Kaan Wayne But the RX-Vision was a non-functional, full-size model made out of styrofoam and clay??? It didn't have an engine or even have steerable front wheels.
    1
  1714. Yes, the sports car market has shifted to the high-end segment... a place where Japanese automakers don't do well....
    1
  1715. But other Japanese sports cars didn't do as badly as the RX-8 which suffered from having the worst fuel economy in its class, a bad reputation for reliability, poor resale value and utterly tragic styling.
    1
  1716. Mazda is well known in Japan as the worst managed Japanese auto maker... with a long history of bankruptcies and models and entire brands that were huge embarrassing flops... anyone remember Amati? Eunos? or ɛ̃fini What about the Miller Cycle engine? that was another big flop that lost money.. they lost $3 billion on RX-8 too!
    1
  1717. Mazda has made a niche for itself in cheap, entry level car market vehicles that are basically disposable after 8 years... So shitty rust proofing is what pay for... rust and corrosion is what you get.
    1
  1718. +Lohan S Just the facts here kid... and the truth is always free of charge... anyone can look at the numbers of RX sales and see that the RX brand was in a fatal death spiral since 1986... Mazda had no choice but to pull the pull on the failing brand before it took the company to its destruction... if it wasn't for $3 billion in Japanese government bail-out loans Mazda would have ceased to exist years ago.
    1
  1719. +Lohan S In case you are not familiar with Mazda (Toyo Kogyo Cork ltd.) kid??? The company has gone bankrupt 3 times in its rather short history... its biggest financial failure was after it attempted (miserably) to launch an all Wankel powered vehicle product line... if FORD MOTOR CO. had not purchased the company from a court ordered bankruptcy sale??? Mazda would have died out decades ago...
    1
  1720. Mazda IS NOT TOYOTA... don't ever forget that son!
    1
  1721. Some people only care about low price... not quality, its the very basis of Mazda's core customer business model.
    1
  1722. @BoogieDownProduction YES, the facts... you must live in a very tiny, sheltered, delusional fantasy world created for yourself... here in the real world Mazda is struggling to survive in a shrinking market segment. BMW never needed a bailout or gone bankrupt 3 times like Mazda has... dropped like a bad habit by Ford... they are deepening their ties with Toyota which will most like acquire a majority stake if not an outright cash buyout in the not so distant future.
    1
  1723. @BoogieDownProduction What is your point? Mazda is one of the smallest, least successful of the Japanese auto manufacturers... and they are currently being clobbered by the Koreans.
    1
  1724. @BoogieDownProduction You are entitled to your personal opinions... but that does not change the fact that Mazda's market niche is selling cheap, entry level cars, it is not seen nor has it ever been perceived as a high performance or a high-end luxury marque... all of the companies efforts to move up-market have been met with failure. The small niche market for cheap Japanese cars that Mazda has occupied is now being overrun by cheap Korean and Chinese cars.
    1
  1725. @BoogieDownProduction Subaru, Honda, Hyundai and Renault... these are underrated car companies... if anything Mazda is overrated.
    1
  1726. @BoogieDownProduction I'm truly sorry that you can not afford to buy something better than a Mazda... perhaps you can go back to school and train for a better job? Mazda has dropped more bombs than the U.S. Air Force... https://www.nydailynews.com/autos/street-smarts/worst-mazdas-of-all-time-article-1.4042620
    1
  1727. Interesting analogy but that does not explain the continuing success of reciprocating engines...
    1
  1728. Wankel engines are like cigarettes, they are a waste of money and time and do not provide any benefits, only harm. Mazda dropped the Wankel engine like a bad habit in 2012 because no one bought them anymore and making them was a huge waste of money that was killing the company... the Wankel is finally gone now, good riddance!
    1
  1729. The Wankel died because no one would buy them anymore.
    1
  1730. All of the legitimate engine manufactures have abandoned the Wankel engine... it is now the sole domain of crackpots and vaporware investment scams Like Paul Moller/Freedom Motors, Davide Garside/AIE and Gilo Cardozo/Rotron Power... none of these con artists have ever delivered a commercially viable product or a reliable working engine for sale.
    1
  1731. @Etownmaczilla 1 https://www.youtube.com/watch?v=tZmd7k33JWE&list=PLmhSXyOMooSlhNQZShFYxRRiz2pB_jl-g&index=3&t=0s
    1
  1732. @Etownmaczilla 1 There were also several companies making Rotary motorcycles too, long before the Wankel engine existed. https://www.youtube.com/watch?v=c4Cq49IDfOc&list=PLmhSXyOMooSlhNQZShFYxRRiz2pB_jl-g&index=11&t=0s
    1
  1733. @will Roland Only when a liter IS NOT A LITER son... I guess you have never heard of the "2X" conversion formula or learned how displacement is calculated???
    1
  1734. @will Roland Then explain why people stopped buying them? Not a single engine manufacturing company anywhere in the world makes them anymore . Even Mazda discontinued them several years ago.
    1
  1735. @will Roland Son, its very easy to spot the real trolls like you... all you have to do is read their sad pathetic comments which are always filled with bitter hatred, childish insults and completely devoid of any rational or factual arguments.
    1
  1736. Terrible fuel efficiency was a hallmark of this now discontinued technology.
    1
  1737. Wankel KKM engines are all 4-stroke, it also requires 1080° of crankshaft rotation to complete its firing order sequence (instead of 720°) in a Otto Engine.
    1
  1738. Indeed, The RX brand's notoriously bad reputation for reliability problems eventually scared away all the new car buyers.
    1
  1739. Mazda RX-8 passed California's C.A.R.B. standards right up until poor sales ended production.
    1
  1740. Thanks for being so honest... very few RX owners will admit that they know little to nothing about cars which is exactly why most people bought the RX in the first place... to hide this embarrassing fact.
    1
  1741. But batteries are too expensive, inefficient and not good for the environment either.
    1
  1742. The Wankel engine typically had about half the efficiency of a modern reciprocating engine.
    1
  1743. The Wankel engine has been obsolete for years.
    1
  1744. Really? What makes you say that? Mazda discontinued Wankel engines because they just didn't sell... What is good for racing is good for sales and the RX brand sold poorly. Their racing performance was lackluster at best and did not inspire higher consumer sales.
    1
  1745. The problem is tuning companies like RUF and AMG (which is a div. of Daimler-Benz now) work very closely with the manufactures... But since there are no companies that manufacture Wankel engines anymore? How can such a Tuner/manufacturer relationship exist? The RX brand was discontinued by Mazda years ago... how could such a symbiotic relationship be formed now? Wankel engines are obsolete in the manufacturing industry and no longer used in racing.
    1
  1746. There is already a huge, custom aftermarket and exotic car industry in the automotive market that caters to anyone that wants something that is unique, different or special in some regard... but with exclusivity comes much greater costs a those that want something special must be prepared to pay accordingly. Mazda Motors has survived as a company by specializing in cheap, affordable entry-level cars targeted at first-time new car buyers... it cranks-out high volumes of just a few models to keep costs down and remain profitable. Mazda it has attempted several times unsuccessfully to break into the high-end luxury and high performance market but failed catastrophically. The Eunos, Amati and ɛ̃fini brands were all commercial failures and have been discontinued. The RX brand which was originally a very cheap, affordable sports car was repackaged as a high performance GT model with the RX-7 FD and this resulted in a very expensive mistake for Mazda, sales were terrible and the RX brands profitability spiraled ever downwards. The RX-8 concept also failed to sell enough units to turn a profit and the entire brand was discontinued in June 2012 to save the company from bankruptcy.
    1
  1747. In contrast, Mazda's MX-5 developed from the Ford Duo-101 concept has been wildly successful and remains one of the companies best selling models ever. It remain the best selling low cost sportscar on the market and the best selling 2-seat convertible in history. Some of us love driving a rear-engine, rear-wheel drive sports car... but not enough of us for any manufacture to sell 100,000 units a year.... Porsche remains successful because its reputation for performance and quality commands prices in excess of 100,000 USD per car... No one is willing to pay 100,000 dollars for a Mazda though... so I suggest you start to appreciate the qualities that make the MX-5 a best seller.... or save you pennies for one of the more exotic brands. Cheers!
    1
  1748. yes...
    1
  1749. BEST THING? NO SHITTY WANKEL ENGINE!!!
    1
  1750. Not sold any more, like all Wankel engines they are discontinued and obsolete.
    1
  1751. Because he is a con artist... a crook.
    1
  1752. Amazing demonstration of this now obsolete engine design.!
    1
  1753. As they say... if you have to ask? You probabley can't afford it
    1
  1754. The internal parts actually only rotate at 1/3 of the shaft speed... Wankel engines can be easily damaged by over-reving... but the 1981 RX-7 only had 100 hp when new and after 60k miles didn't have enough power to self-destruct unless you pushed it off a cliff.
    1
  1755. He did not build this engine... it was designed and manufactured by Graupner GmbH. or its successor OS.
    1
  1756. Frederick Röders EVs are more harmful to the environment... they create more CO2 emissions and waste more energy.
    1
  1757. Frederick Röders The oil companies only provide what customers want to buy! If you hate petroleum then please boycott all products which use petroleum... of course you will quickly find yourself living in a cave eating dirt, and realizing what a hypocrite you were...._
    1
  1758. +Frederick Röders As greedy as the Copper, Cobalt and Lithium companies that will make billions all while polluting the Earth with even more harmful toxic pollution? Are you really that naive???
    1
  1759. Mazda does not sell Wankel engines anymore.
    1
  1760. Trump is pro America! shillery clinton is a crook and a liar!!!
    1
  1761. It will take decades to recover from the corruption of the Clinton family mafia... its laughable to think democrats actually believed she could become president! LOL!!! SHE COULDN'T EVEN WIN AGAINST TRUMP!
    1
  1762. SHOCKING NEWS! Mazda CEO Akira Marumoto has confirmed there will No New Rotary Engine. https://thedriven.io/2019/06/11/mazda-confirms-100-electric-car-model-for-2020/
    1
  1763. Wankel engines cannot produce good combustion... the shape of its chamber is severely flawed.
    1
  1764. Wankel engines were developed and marketed for lawn mowers too but they proved to be a colossal failure and were quickly discontinued.
    1
  1765. not made anymore
    1
  1766. The larger the diameter of the Wankel engine the slower the engine must run to prevent damage to the seals and the housings.
    1
  1767. Coupe is not a French word..?
    1
  1768. But the important thing to remember is that they are no longer used for automobile engines because of the poor reliability and low efficiency problems that have always plagued this design as an internal combustion engine they no longer offer any advantages over reciprocating engines and could no longer compete with them and had to be discontinued.
    1
  1769. I guess that is why New Zealand doesn't have an automotive industry or international racing... poor bastards are still fooling around with old obsolete junk!
    1
  1770. Wankel engines are obsolete today for the simple fact that they are inferior to reciprocating engines...
    1
  1771. The biggest problem with the Wankel was they cannot compete with reciprocating engines as a commercially viable engine technology, Like Mazda, Graupner GmbH. discontinued this engines due to lack of sales.
    1
  1772. Run it lean and the Wankel's poor combustion design results in pre-ignition and detonation.. causing damage to its apex seals.... the primary failure mode in all Wankel engine designs.
    1
  1773. The Wankel's poor combustion efficiency tends to produces high volumes of HC and CO pollution... not NOx. Due to the inherent low compression ratio limit and low thermal efficiency NOx output tends to be lower that comparable reciprocating engines which run higher pressures and leaner AFRs.
    1
  1774. Wankel engines are less efficient when operated on alternative fuels like ethanol because they cannot operate at the higher static compression ratios needed for efficient combustion.
    1
  1775. Not true, The Wankel KKM design has a triangular shaped piston that orbits in a distinctive planetary motion... the axis of the piston reciprocates twice per revolution of the crankshaft.
    1
  1776. Wankel engine have never been successfully manufactured or sold as generator engines because of their extremely poor energy efficiency and higher fuel consumption.
    1
  1777. Not True, it seems you do not fully understand the internal workings of the Wankel KKM engine... The Mazda 13B series for example has 30mm stroke that results from the 15mm stroke of the crankshafts offset journal. The Piston's axis RECPROCATES Right to Left and then Left to Right each revolution of the crankshaft. This 30mm stroke is what facilitates they change in swept volume that allows intake, compression, expansion and exhaust gases to be expelled.
    1
  1778. No, the piston's central axis reverses direction twice per crankshaft revolution. Usually side-to-side instead of up and down... but reciprocating none the less.
    1
  1779. But only the crankshaft, remember the 3:1 ratio? The rest is only turning at 9,600 rpm... rather slow for a RC engine this size.
    1
  1780. The major downside is the short crankshaft stroke and the 3:1 ratio results in very poor mechanical efficiency and undesirable torque characteristics.
    1
  1781. The extremely high reciprocating mass restricts the operating rpm to less than a comparable 2-stroke or 4-stroke reciprocating piston engine like the Otto or Benz type engines.
    1
  1782. Wankel sound...
    1
  1783. All Wankel engines use the 4-stroke operating principle, the Wankel is not a 2-stroke.
    1
  1784. @.SpiinDeX TROLL ALERT! Hey .SpiinDeX! Do not have anything better to do but troll people on Youtube? Sounds like your the one that needs to get a life... go troll somewhere else.
    1
  1785. Skyactiv-X is real... and coming next year, Skyactiv-R was just a concept and does not actually exist in real life... Mazda only makes reciprocating engines now.
    1
  1786. The Wankel has proven to be very poorly suited to any applications, which is why it never saw widespread adoption and is now completely obsolete.
    1
  1787. Then why are they no longer manufactured commercially for either ultralight planes or RC planes? High propeller rpms are BAD for efficiency and performance..Most Wankel aircraft prototypes I have seen (they are extremely rare) were not direct drive at all but required additional gear reduction drives which add extra weight and complexity.
    1
  1788. Wankel engines have never been mass produced for any Commercial, Civil or Military manned production aircraft either. BSFC is a critical factor in aircraft design and the Wankel offers the worst BSFC performance of any internal combustion design... Do you even know what BSFC is?
    1
  1789. Small aircraft? Please cite a single Wankel engine available that is FAA or EASA certified for flight-worthiness? Drones? You mean UAVs? The UAV market is dominated by a single manufacturer now, ROTAX GmbH. which although was a Wankel licensee in the 1960's (Fichtel&Sachs) now only manufacturers reciprocating 2 stroke and 4 stroke engines.
    1
  1790. So if you know what BSFC is? Then you understand what a huge disadvantage and weight penalty the Wankel has in aircraft design, reduced range and reduced payloads... its why aircraft manufactures abandoned development of Wankel engines decades ago.
    1
  1791. Not true, low rpm propellers are more efficient and develop more thrust. True, gas turbines offer an order of magnitude greater power-to-weight performance compared to the Wankel... and far greater fuel efficiency.
    1
  1792. No, they are not.. in fact there are very few Wankel powered aircraft and are exceptionally rare as they are mostly single one-off prototypes. You seem to know very little about rechargeable batteries too... they will never see widespread use in aircraft because of the Specific Density problem, the Laws of Electro-chemistry severely limits both practical and theoretical battery performance.
    1
  1793. There are prototypes of light prop planes that are power by giant rubber bands too... You really need to educate yourself about the density limits of rechargeable batteries... because unless you can discover a new (stable) Element for the Periodic Table? Batteries will never be able to compete with density performance of liquid hydrocarbons... as this violates the Laws of Electro-chemistry and Quantum physics.
    1
  1794. +John Burns John you are a crackpot
    1
  1795. +John Burns Still spreading lies and false rumors.
    1
  1796. Yeah, for a plastic garden shed.
    1
  1797. Its too bad they didn't hold there compression or there sales volume very well
    1
  1798. Rust in Peace Wankel engine 1964 - 2012
    1
  1799. You earned it! Congratulations Ian!
    1
  1800. A lot of reciprocating mass too... which is why the internal rotation is only 1/3 of crank speed... and that is limited to lower speeds than reciprocation engines. The Wankel has been obsolete in engine manufacturing for several years and had several fatal flaws inherent to its basic design concept which are due to the limitations of its very restricted geometry envelope that allows it to operate.
    1
  1801. A single chamber Wankel engine only fires ONCE per crankshaft revolution (360°) the orbiting piston(rotor) rotates with a ONE-to-THREE RATIO the Wankel KKM requires 3 crankshaft revolutions (1080°) to complete its 4-stroke cycle in each of the 3 rotating combustion chambers. 3 rotations = 3 firing/ combustion cycles Any questions?
    1
  1802. No offense taken... the Wankel is obsolete for one reason... it was not a very good engine.
    1
  1803. Sounds like a great idea... putting an LS V-8 would be an even better idea.
    1
  1804. @SpeedasaurusDex Extremely poor torque characteristics was a major disadvantage that led to the Wankel being a commercial failure and why it is obsolete today.
    1
  1805. @SpeedasaurusDex Only because all the series points leaders retired early due to a major accident... The Mazda 787B was a disappointingly slow and uncompetitive car that lost 20 out of 21 races, zero poles and zero fastest laps. Mazda lost the 1991 WSC championship to Jaguar.
    1
  1806. @SpeedasaurusDex Compared to what? Wankel powered bikes? Wankel engines were an even bigger failure in motorcycles than cars.
    1
  1807. @SpeedasaurusDex Well then please cite some specific examples, their torque per liter output, BMEP and BSFC performance for comparison.
    1
  1808. @SpeedasaurusDex Just the facts here kid, Wankel engines are obsolete because they are fundamentally and inherently inferior to reciprocating engines, these facts are irrefutable.
    1
  1809. @SpeedasaurusDex Then why are they not used in applications where high power and power-to-weight ratios are critical, like helicopters and military tanks???
    1
  1810. @SpeedasaurusDex Porsche has won the Le Mans 24 hours 18 TIMES!!!! with reliable reciprocating engines, Audi has won Le Mans 9 TIMES!!! with a DIESEL engine...
    1
  1811. @SpeedasaurusDex I just proved you are full of shit kid, fansites and Wikipedia do not make you an expert on Wankel engines, in fact what little you do seem to know is completely wrong.
    1
  1812. @SpeedasaurusDex You do not intimidate me in the slightest kid, the truth is incontrovertible, malice may attack it, ignorance may deride it, but in the end we will both remain right here whether you like it or continue to deny it.
    1
  1813. @SpeedasaurusDex Childish tantrums won't make you look very smart or salvage your failed arguments... they only make you look immature and like a very bad loser. The truth is irrefutable, you cannot change the facts with your feeble attempts to intimidate or bully me, you are nothing but a complete ineffectual.
    1
  1814. @MajorLeague Its very clear that you do not understand what DISPLACEMENT is or how its calculated...
    1
  1815. @MajorLeague You kid are nothing but a FAKE and a FRAUD... you obviously have no formal education or professional experience in the field of engineering and are unable to speak intelligently on this topic.
    1
  1816. @MajorLeague You are a liar and a fake, an amateur fraud that doesn't even understand the basic concept of DISPLACEMENT!!!
    1
  1817. @MajorLeague You are a liar and a fake, an amateur fraud that doesn't even understand the basic concept of DISPLACEMENT!!!
    1
  1818. Anyone that believes its only a 1.3 liter is no expert... he probable thinks its a 2-stroke too!
    1
  1819. @Gage Jerigen You obviously have no clue why these engines are completely obsolete in the manufacturing industry today... The automotive manufacturers know some things that you do not.
    1
  1820. @Gage Jerigen That is a very naive statement that could only be made by someone who is not qualified or experienced enough to speak intelligently on this topic.
    1
  1821. @Gage Jerigen You really don't know anything about engineering, the Wankel KKM design or its development history do you?
    1
  1822. @dbspaceoditty The FIA never banned Wankel engines fron WSC competition... Mazda retired the 787b after losing the championship. This was all announced prior to the Le Mans race in June 1991.
    1
  1823. @dbspaceoditty False urban myths, The RX-7 suffered steadily declining sales after 1986 and the FD was a huge financial failure... The RX brand was discontinued because the cars did not sell anymore... its that simple.
    1
  1824. @dbspaceoditty You mean 20 years of false urban myths? There are no peer-reviewed publications that have ever made that claim.
    1
  1825. @dbspaceoditty The 1991 season was the transition year to the new 3.5 liter engine formula... although most of the teams were already running the new 3.5 liter engine Mazda was allowed to still run the R26B. Mazda announced the Judd V-10 would be used next year (before the 1991 Le Mans 24 hours.
    1
  1826. @dbspaceoditty Urban myths are caused by stupid lazy people like you... that mindlessly regurgitate lies and false information without ever bothering to check if what you are saying is actually true...
    1
  1827. @dbspaceoditty Mazda retired the 787B because the chassis was slow and outdated, and Mazda did not want to invest anymore cash into a new 3.5 liter Wankel engine, they signed a deal to compete with the Judd V10 engine before the 1991 Le Mans 24 hours but it was the last season the old engine formula would be used.
    1
  1828. @dbspaceoditty IF it was better??? Then Why did Mazda never win a single endurance racing championship? Mazda LOST the 1991 Le Mans series Championship to JAGUAR.
    1
  1829. @dbspaceoditty If they were better? Why is it that people stopped buying them, Mazda discontinued them due to lack of sales.
    1
  1830. @kling the king Skyactiv-X only exists as a 4-cylinder reciprocating design. Mazda no longer makes Wankel engines.
    1
  1831. @Negative_Flect No one can make the Wankel better... its an inherently inferior design that cannot compete with reciprocating engines, it is obsolete technology.
    1
  1832. @Dealor Did you know that Ford Motor Company once held more patents on the Wankel engine than Mazda... and they NEVER SOLD A SINGLE WANKEL ENGINE!
    1
  1833. Most new car buyers agreed with you... which is why this car sold so poorly.
    1
  1834. A Wankel KKM-57 type engine to be correct, this engine in particular was manufactured by Graupner GmbH. who was one of 26 Wankel-KKM licensee's that purchased the rights to this design from NSU Motorenwerkes GmbH.
    1
  1835. Not made anymore.. Wankel engines are obsolete now
    1
  1836. heard that before...
    1
  1837. Elon Musk just made $2.6 BILLION dollars... and is asking for another $55 Billion... makes you wonder who you can trust?
    1
  1838. Wankel engines are obsolete... it was a dead-end technology.
    1
  1839. What power? Wankel engines just burn fuel and make noise...
    1
  1840. Yeah, but Audi won the 24 hours of Le Mans 9 TIMES!!!! with a Diesel engine... so that's not saying much for Wankel engines...
    1
  1841. THEY WON LE MANS 13 TIMES!!! Mazda abandoned development of Wankel engines in May 2009 and all production ended in June 2012... Wankel engines are obsolete in the automotive and engine manufacturing industries because they are inherently inferior to reciprocating engines which are still mass produced in the millions every year.
    1
  1842. You weren't paying attention then...
    1
  1843. Nice to see there is still a strong demand for American made Mining and Railroad equipment in the world.
    1
  1844. Obsolete, discontinued by Graupner GmbH. years ago.
    1
  1845. That is why they are no longer being made... Wankel engines are obsolete.
    1
  1846. glow plug
    1
  1847. Mazda was allowed to detune (reflash the ECU) all the Renesis engines replaced under during the NHTSA recall campaign...
    1
  1848. Wankel engines all suffer from the same flaw stemming from the inherently weak and easily damaged sealing system, compression loss is not just a common problem... its guaranteed certainty.
    1
  1849. They make a great paper weight... as an engine they are not so good.
    1
  1850. obsolete, no longer sold
    1
  1851. Specific Density is a major disadvantage of electric aircraft..or any vehicle for that matter..
    1
  1852. Rest assured this will never happen... because commercial airlines will not switch to electric... as this will never be a commercially viable or practical technology.
    1
  1853. If Specific and Energy density are not critical design requirements in commercial aircraft design? Why do they use Jet Fuel exclusively to the exclusion of all all other fuel types?
    1
  1854. "Learn to English?" Lol! that's funny!
    1
  1855. "If you have twice to several dozen times the available storage for electricity in the chassis of the vehicle, you don't need huge tanks taking up the interior of the wings and large sections of the fuselage. That space can be for batteries or eliminated all together, making the craft more efficient." But how does that address the SPECIFIC DENSITY problem??????
    1
  1856. Please cite a peer reviewed paper published in any scientific or engineering journal that proves an order of magnitude increase in Specific Density in practical rechargeable chemical storage batteries???
    1
  1857. Perhaps you should study-up on the limitations of practical, rechargeable batteries??? because the Laws of Electro-chemistry do not allow for such battery technology to ever exist...
    1
  1858. Please cite an example of a commercial passenger aircraft currently in production with a piston engine?
    1
  1859. "Learn to English?" I was making fun of your lack of basic sentence structure, grammar, and punctuation. I'm glad you're amused.
    1
  1860. But you are referring to Energy Density not SPECIFIC DENSITY DO YOU NOT UNDERSTAND THE DIFFERENCE?????
    1
  1861. Please cite an example of a practical structural element that is also a competitive rechargeable battery???? or do you have your head in the clouds again????
    1
  1862. "whatever nanotech Volvo’s using to imbue the carbon fiber with more conductivity—is likely prohibitively expensive."
    1
  1863. Apparently you do not yet understand the difference between Commercial Aircraft and Civil Aircraft??? None of the planes listed in your link are either FAA or EASA certified for commercial aviation service.
    1
  1864. You still appear to be very confused about battery technology and its terminology Specific Density as in ENERGY DENSITY measured in Mass eg; Megajoules per Kilogram as opposed to Megajoules PER LITER of VOLUME. You really need to get a handle on the fundamentals if you wish to converse intelligently on the topic of rechargeable chemical storage battery performance and electric vehicle design requirements son.
    1
  1865. Sorry I embarrassed you... I thought you had at least a basic understanding of the fundamentals involved in electric vehicle design.
    1
  1866. Graphene is a nanotechnology...
    1
  1867. EVs are not the future... not 130 years ago when EVs were introduced and not now either... No amount of research will ever produce practical, rechargeable battery that can match the energy density performance of recharge rates of liquid hydrocarbons and this is why EVs have remained nothing more than a tiny niche market segment in the industry for over 100 years.
    1
  1868. Millions of Diesel cars on the road right now... doesn't seem to be an insurmountable problem.
    1
  1869. You can't... they are not made anymore, Wankel engines are obsolete now.
    1
  1870. Yes, Its been done.. but Wankel engines are obsolete technology now... no longer produced anywhere in the world today.
    1
  1871. Not really, 26 of the biggest and best engine manufacturers and over 100 universities and research institutes concluded that the Wankel engines were inherently and fundamentally inferior the reciprocating engines that are sold by the millions, the Wankel was both a colossal commercial and engineering failure.
    1
  1872. As I said, its been done already... and proved to be a dumb idea.
    1
  1873. Its a little complicated but I will try to summarize for you; One of the major flaws in the Wankel design is the extremely high reciprocating and orbiting mass due to the large heavy triangular pistons (aka rotors). The longer the eccentric-crankshaft is, the greater the torsional stress on the shaft and housings... this causes flexing and distortion that results in the piston/rotor contacting and damaging the surface of the housings, allowing greater clearance causes the apex and side seals to not seal properly and fail prematurely. In summary it turned out to be a bad idea, the ideal Wankel engine design is a single chamber, while 2, 3, 4 and 9 chamber stacks have been tried they increase in weight and decrease in reliability as you add more chambers... so its a bad idea, not a good one. If you have any additional questions please feel free to ask. cheers!
    1
  1874. The video was produced primarily for entertainment and comedic effect and is full of egregious errors and mistakes... The biggest error is the version of the Wankel engine shown in the video is not even the one designed by Felix Wankel... so many of the concepts mentioned in the video do not even apply. So If you are basing anything you know about Wankel engines on this video? Most of what you know will also be wrong.
    1
  1875. So? The Wankel is much less efficient as a 4-stroke engine... while it is a very interesting design it was ultimately a failure because it is not as good as other types of internal combustion engines that were very successful.
    1
  1876. +Chocolat You are the troll spreading lies and false information... remember?
    1
  1877. +Chocolat All you did was make a complete fool of yourself... you were exposed as a liar and an imbecile.
    1
  1878. That is exactly why they are no longer manufactured anywhere in the world today... they became obsolete several years ago.
    1
  1879. maybe the RX-7? But the RX-8? It will be remembered just like the Ford Edsel and the Pontiac Aztec
    1
  1880. 4-stroke
    1
  1881. The average driver really doesn't need 600 hp... or want to pay for the additional performance equipment needed to make a 600 hp car safe to drive.
    1
  1882. The latest versions of the new Corvette currently have VVT (Vtec in Honda speak) and Dodge HEMI engines have VCT (VANOS in BMW terminology)
    1
  1883. Hey Ernie? Can you tell us why your engine does not run????
    1
  1884. Why can't you buy one???
    1
  1885. It already died actually... they have been obsolete since 2012
    1
  1886. Your comments are FAKE, MAZDA DISCONTINUED DEVELOPMENT of Wankel engines in May 2009.
    1
  1887. PLEASE CITE A SINGLE COMPANY THAT PRODUCES WANKEL ENGINES IN SERIES PRODUCTION AND THEIR MONTHLY PRODUCTION OUTPUT
    1
  1888. Actually Curtis Wright was the first Wankel KKM engine licensee in 1958. The Wankel-NSU company was purchased by VW in 1969 and was merged with AUDI which still holds any remaining rights to the Wankel design and trademarks.
    1
  1889. No worries... cheers!
    1
  1890. Not much power either... just 1 hp, never popular they were discontinued years ago.
    1
  1891. Rest in Peace Wankel engine 1964 -2012
    1
  1892. The Wankel is dead.
    1
  1893. Then why did these engines have such a low power-to-weight ratio and why were they discontinued due to lack of sales if they are as you say "ideal" for all kinds of model aircraft????
    1
  1894. You are the one that is very confused here son, the Wankel engine was an epic failure and has been obsolete for years... The Wankel engine never saw any successful production in tanks or any other heavy duty vehicle applications and were a total commercial failure in the aviation industry... not a single type-rated aircraft has ever been produced with a Wankel engine, they are totally unsuitable to aircraft applications. Graupner GmbH rates the 49PI engine at only 1.1 PS ( 1.0 horsepower) this engine has been discontinued for a long time because it could not compete with traditional reciprocating RC engines in power-to-weight or reliablity. Mazda's foray into the Wankel engine was a financial disaster and the company has not unveiled a new production engine in 25 years. production ended June 22nd 2012.
    1
  1895. I think you need to learn what "displacement" is kid... you are very confused on this topic particularly in regards to the Wankel engine...
    1
  1896. @This. The Graupner GmbH. PI-49 has a displacement of 5ccs (4.97cc) or 0.196 cubic inch. it only produces 1 horsepower which is low for an RC engine this size.
    1
  1897. Sounds like it was a poor investment... same problem Mazda had too... Rotary fans cry they want to buy one but the truth is they never actually buy anything when it is available.
    1
  1898. All Wankel engines use the exact same 4-stoke operating principles as reciprocating Otto and Diesel engine do...
    1
  1899. Felix Wankel hated this engine....
    1
  1900. That's not really saying much now is it?
    1
  1901. "Long Life Wankel" is an Oxymoron.
    1
  1902. Nothing sporty about about a sedan pretending to be a GT coupe
    1
  1903. Sooner or later Toyota will own majority control of Mazda... just like Ford did for decades.
    1
  1904. Why not just use a piston the first time and burn all the fuel efficiently the same time??? That is what all the engine manufacturers do now, even Mazda.
    1
  1905. Yes, Wankel engines are a waste of time...
    1
  1906. The Wankel engine died in 2012 when it became obsolete.
    1
  1907. Not really, the brits lagged behind the Germans and the Americans in supersonic research.
    1
  1908. @David Elliot Rolls-Royce SOLD the Nene to the Soviets because no Western aircraft manufacturers wanted to buy the over-sized and under-powered Nene. The Klimov KV-1 is a significantly redesigned and improved engine producing 1,000 lbs more thrust.
    1
  1909. The UK aero industry began after WW2 producing a long line of white elephant projects and epic failures that let to today where aircraft are no longer designed or built by british companies. The pattern being that aircraft from the UK were not very good...
    1
  1910. @David Elliott The world's first unmanned supersonic vehicles were designed and mass produced in Germany during WW2... the very same German supersonic windtunnel used by the Nazis in WW2 was also used to design the vehicle that put man on the moon.
    1
  1911. Mazda doesn't use Wankel engines anymore...
    1
  1912. There have been a lot of false rumors flying around but Mazda discontinued its development of Wankel engine 10 years ago and unveiled its very last production Wankel engine 25 years ago.
    1
  1913. Not a very believable rumor... range extenders were a massive failure... only one ever made it to production as an option and it was canceled last year... under the new emissions laws range extenders do not qualify as zero emissions vehicles and all of the automotive manufacturers have dropped there plans to produce range extenders. California and 11 other states have banned range extenders.
    1
  1914. Where is it then? This is just another clickbait rumor started by one of the amateur blogsites
    1
  1915. Mazda has not unveiled any new Wankel engines or Wankel powered cars since 2008.... over a decade ago.
    1
  1916. 99% of all patents never become a commercially successful product... Wankel engines are completely obsolete in the automotive and engine manufacturing industry... Mazda cancelled all development of production Wankel engines 10 years ago and all production was halted 7 years ago.... the last time Mazda unveiled a new production Wankel engines was 25 years ago...
    1
  1917. You have to be very naive to think that any automotive manufacturer is considering a relaunch of the infamous Wankel engine... it was one of the greatest commercial blunders of the 20th century and is now completely obsolete in the 21st century...
    1
  1918. Everyone knows that Wankel engines are horribly unreliable... Mazda doesn't sell cars with Wankel engines anymore... go down to your local Mazda dealer.... The RX brand was discontinued years ago.
    1
  1919. NOT TRUE... RX sales went into a steep and steady DECLINE after 1986 and the last two models never made any profit due to disappointing low sales.
    1
  1920. Mazda was really out to lunch with the Wankel engine... of all the 26 major engine manufacturers that licensed the Wankel KKM, most of them completely abandoned the troubled design by 1975... the same time Mazda went bankrupt and was bought by Ford after its embarrassing failure to launch an all Wankel powered model line-up... Ford dumped Mazda just as the RX-8 failed and sent Mazda into bankruptcy for the 3rd time in its very short history.
    1
  1921. You don't really know much about the automotive or engine manufacturing industry do you??? Its not surprising really, fans of Mazda RX models tend to be the least knowledgeable of all automotive enthusiasts.
    1
  1922. Tesla motor is probably the biggest scam in history.... Elon Musk just made $26 BILLION dollars!!! But the companies long term business model is on a collision course with bankruptcy.
    1
  1923. Elon Musk can easily bail-out on Tesla when stock prices start too tank... which won't be too far off.
    1
  1924. Tesla is a Ponzi scam... the end is near.
    1
  1925. Not much power... or durability.
    1
  1926. @Kaguya Houraisan Nah, because I just know a lot more about engines than a kid like you.
    1
  1927. @Kaguya Houraisan HEY! DO YOU KNOW WHAT DAY IT IS????? Today marks the 7th anniversary of the final demise Mazda RX production, on Thursday June 21, 2012 at 4:30pm the final RX-8 car ever to be produced rolled off the assembly line, the last RX model to ever be produced by Mazda.
    1
  1928. @Kaguya Houraisan R.I.P. Wankel engine 1964 - 2012
    1
  1929. @Kaguya Houraisan If you act like a little kid you will be treated like one... you still have a lot to learn yet.
    1
  1930. Very inefficient... that's why these engines are obsolete now!
    1
  1931. Bigger size means it would only waste more fuel, reciprocating engines make more power and use less fuel... that is why they are still made and these are no longer made.
    1
  1932. This Month is the 7th anniversary of the end of RX production, on Thursday June 21, 2012 at 4:30pm the final RX-8 car ever to be produced rolled off the assembly line, the last RX model to ever be produced by Mazda.
    1
  1933. General Motors, Mercedes-Benz, Ford, Porsche, Toyota and 22 other companies spent BILLIONS of dollars proving that your theory is completely wrong... development of the Wankel was abandoned by all the major manufacturers because it was found to have very little further development potential... even Mazda abandoned the design in 2009.
    1
  1934. They are obsolete now because they do not offer any significant advantages and were plagued with several serious fatal flaws.
    1
  1935. To run your windshield wipers or your heater blower????
    1
  1936. All Wankel engines used the 4-stroke operating principle.
    1
  1937. Wankel design was plagued by serious flaws and disadvantages, as of 2012 it is completely obsolete... this is because it was inferior to reciprocating engine designs that it failed to replace.
    1
  1938. "Rust in Peace" Wankel engine 1964 - 2012
    1
  1939. Ernie! WHY? Why does you engine not run????
    1
  1940. +User Name Indeed, Imitation is the great form of flattery.
    1
  1941. Just answer the simple question... "Please explain why you would want a gasoline fuel that acts like Diesel fuel??? and how that would solve the flaws in the Wankel engine?"
    1
  1942. No, you are a liar, what kind of fake are you? Just answer the simple question PLEASE... "explain why you would want a gasoline fuel that acts like Diesel fuel??? and how that would solve the flaws in the Wankel engine?"
    1
  1943. Elon Musk just made $26 BILLION Dollars... do you really thin he gives a shit about workers? He obviously doesn't give a shit about his customers!
    1
  1944. @Austin K Mazda abandoned development of all Wankel engines in May 2009... all 26 of the original Wankel KKM licensee's have ABANDONED the Wankel design (including Mazda) they are no longer made anywhere in the world.
    1
  1945. @Jake Rosendahl Shame on you Jake, you shouldn't repeat false rumors... its the same as lying.
    1
  1946. This is a Wankel engine... not a Rotary Engine.
    1
  1947. Ernie! Why doesn't your engine run????
    1
  1948. Sounds like more fake news!
    1
  1949. These small RC model engine use glow plug or hot bulb ignition.
    1
  1950. Great comment, That is correct. Hanns Paschke the inventor of the Wankel KKM engine called it an "Orbiting Piston Engine" KKM stands for Kreiskolbenmotor or Orbiting Piston Motor in English.
    1
  1951. A rotor is something that spin concentrically on a fixed axis... the triangular piston in the Wankel engine "Orbits" inside the housing with a Planetary Motion distinctly different than "Rotary Motion" Cheers!
    1
  1952. Wankel engines were a completely dead end technology...
    1
  1953. No, unfortunately there are precious few that really know or understand anything about the history or development of the Wankel engine...
    1
  1954. Elon Musk is the greatest con man in history!!!
    1
  1955. Depends on the application.. inline 6 is smoother, less vibration but longer and heavier.
    1
  1956. Obsolete, no longer made anymore... have to buy second or used parts
    1
  1957. The triangle is the only shape that allows each face to complete its 4-stroke operating principle in 3 crankshaft revolutions and allows the necessary geometry to produce the change in swept volume and still maintain a sealed chamber. The triangular piston (rotor) does not rotate concentrically on a fixed axis, it orbits in a planetary motion. Yes, the limitations of the Wankel engines inherent geometry is why it produces very little torque, has low thermal efficiency and the reason why it has terrible combustion efficiency.
    1
  1958. +Jake Garrett You have never driven a real performance car have you?
    1
  1959. Wankel engines are notorious for premature failures due to compression loss... its why Mazda discontinued these unreliable engines.
    1
  1960. Range extenders are are monumentally stupid which is why no automobile manufacturer sells one.
    1
  1961. @Gewdvibes You really don't know anything about cars do you kid? Toyota sells more Camry models in ONE MONTH than Tesla sells CARS IN AN ENTIRE YEAR! EVs make up less than 1% of the cars in the world and this market share remains stagnant.
    1
  1962. That is a lie. There are currently no countries that have banned ICE cars and no agreement to phase them out... There simply is no technology available to completely replace them and they will be around for and for sale well into the foreseeable future.
    1
  1963. @Gewdvibes Unless it is signed and adopted into law? It is completely meaningless.... which exactly what it is. Just the facts here son, childish insults won't make you look very smart or very mature, and they certainly won't support your false assumptions about automobiles and the automobile industry.... it just makes you the angry troll here. Don't hate, EDUCATE yourself!
    1
  1964. @Gewdvibes The recent riots in France have definitely scratched Paris off that list... the people there have spoken and they do not want electric cars or higher taxes to pay for them.
    1
  1965. @Gewdvibes Just the facts here... there are no bans on internal combustion cars in Europe or America... I think you are having a difficult time distinguishing real news from fake news.
    1
  1966. @Samuel Thornton Well, if they were better? Then why did people not want to buy them??? Sex? only if you are gay... but as you might know already the LGBTQ community no longer supports Mazda... they have named Tesla Motors as the official car of the gay and lesbian community.
    1
  1967. @Samuel Thornton Electric cars are great... if you are GAY! https://www.youtube.com/watch?v=eLSR_pa6vjk
    1
  1968. +Motakai I love Doritos... Cool Ranch flavor is my favorite! Don't HATE, EDUCATE yourself.
    1
  1969. Mazda care too much about staying in business to shove a dirty, inefficient and unreliable Wankel in their cars anymore...
    1
  1970. @Forever13 pt Can you please offer a successful, practical example of the Bourke engine? As far as I'm aware its dubious and unfounded claims are yet to be verified by any independent third party testing... and no company currently offers one for sale to confirm these grossly inflated claims.
    1
  1971. @Forever13 pt Mazda has only confirmed a joint venture with Toyota and Denso to produce a plug-in, 100% electric vehicle. Mazda no longer sells cars with Wankel engines... no automotive manufacture has for several years now... the design is now completely obsolete in the engine manufacturing industry... so NO its not coming back.
    1
  1972. @Forever13 pt No its not, Mazda discontinued production of Wankel engines and no one is making range extenders anymore... the concept never really got off the ground.
    1
  1973. @Forever13 pt But you cannot prove that the Bourke offers any practical advantages, only conjecture regarding possible theoretical ones... and that doesn't pay the bills or power automobiles down the road... so therefore not worth mentioning.
    1
  1974. @Forever13 pt The truth is irrefutable... there are no Wankel engines in development at Mazda or any new cars using them... and there is no evidence to prove otherwise.
    1
  1975. @Valdimir Lucifer Oh Yeah? SO WHAT? Mazda has been saying that for over 8 years now and it never comes true!!! They have not unveiled a new production Wankel engine in 25 YEARS!!!! Maybe you are just a fool to believe any of these false rumors.
    1
  1976. @Valdimir Lucifer More lies... Rumors are never confirmed, that is why they are called rumors and not facts!! There are no new Wankel engines coming from Mazda... idiots like you have been repeating these same false rumors for decades... how can you be so gullible?
    1
  1977. You have to buy special fuel.
    1
  1978. +Michael Yachnis You will only have a slightly better chance of spotting a rotary powered car on the road than seeing a unicorn... Rotary powered cars were extremely rare and the few that still exist are in museums.
    1
  1979. +Michael Yachnis Are you not familiar with the difference between a technical school and a university engineering program? We studied Sterling engines and Gas turbines when I was in college too... but you won't find any of these engines powering a car on the road either. Mazda abandoned development of Wankel engines in May of 2009 and ceased all production on June 22, 2012. There was some talk in stop-gap development of range extenders years ago when battery technology was struggling to meet minimum requirements for production, but this interest has quickly died-out as current regulations and subsidies make them unpractical, not a single auto maker has ever offered a range-extender on any vehicle as standard equipment. Mazda made an official announcement last year that it had signed a deal with Toyota and Denso to produce a pure battery electric vehicle to meet California's new ZEV regulations as both companies fought unsuccessful to include hybrids and range extenders into the new ZEV laws. There is zero evidence to support that Mazda has any plans to reintroduce the long obsolete Wankel engine... only a flurry of completely unsubstantiated "clickbait" rumors that are cranked-out by amateur blogsites because they are sure to generate "hits" and revenue on their website.
    1
  1980. Toyota sells more Camry models in one just month only than Tesla sells cars in a whole year...
    1
  1981. Bad choice... very bad choice.
    1
  1982. More moving parts than a 2-stroke
    1
  1983. Compared to what? Mazda used to sell Wankel engines... nothing could be more unreliable!
    1
  1984. Some idiot like you said the same stupid remark 100 years ago... its still not true.
    1
  1985. @SidewaysGts Batteries are not the future, only an idiot would believe that
    1
  1986. And that why they didn't sell when they came out... you don't get much for your money.
    1
  1987. Actually its a 3.9 liter... not a 1.3, but when we compare it to a reciprocating 4-stroke engine using the "2X conversion formula" its considered a 2.6 liter.
    1
  1988. He was 50 when invented the DKM-54 engine... But he never came up with the idea for this engine... the Wankel KKM was invented by Hanns Paschke and Walter Froede... in 1957.
    1
  1989. No, Wankel engines require spark ignition only and a relatively high octane fuel to prevent damage, Diesel fuel is extremely low octane.
    1
  1990. Yeah, but once one of the apex seals pops (at 60k miles) these thing just make a lot of noise and can barely get out of their own way.
    1
  1991. They all do... Wankel engines are very dirty and inefficient.
    1
  1992. Actually it is more complicated than a comparable 2-stroke RC type engine... which is why they are so popular and the Wankel is no longer sold.
    1
  1993. If that really worked? Mazda would still be selling these cars..
    1
  1994. Good point, the Wankel KKM engine design has a much lower mechanical and thermal conversion rate, it converts less of the heat energy into rotational work than a typical reciprocating engine can. The Wankel engine converts less of the energy in the fuel into heat, and less of the heat into useful work.
    1
  1995. Tesla is the official car of the LGBT community that's why...
    1
  1996. The RX-8 only makes 60 horsepower per liter (total displacement) or 87 horsepower per liter (corrected to 720°) Not impressive at all and one of the reasons why they were discontinued.
    1
  1997. @ThatGuy Typing Your comment is nothing but very faulty assumptions based on a complete lack of knowledge regarding the facts surrounding the Wankel engine's history and development... Mazda was only one of a large group (26 of the largest and best engine manufacturers in the world) not to mention around 100 of the world's best universities and research institutes.. all working to solve some or the serious drawbacks of the design.. it took about 20 years and over a billion dollars of combined effort in development before some sobering and disappointing conclusions had been reached.. the conclusion that the previous reciprocating engine design were actually far superior and the Wankel had several inherent drawbacks that could not be fixed. 50 years ago the Wankel did offer significant advantages in lower weight, higher power density over other engine designs available at the time, but these were heavy, inefficient flat-head designs made from cast iron. The Wankel was never cheaper produce or offered a longer or more reliable service life. 26 of the largest engine manufacturers and over 100 of the best universities and research institutes in the world spent billions on development of the Wankel. The engineering potential of the Wankel was exhaustively researched and its practical and theoretical limits have be tested and are well understood. The facts are that the low efficiency of the Wankel is inherent to the engines very basic fundamental design geometry and shape that created it.. the Otto and Diesel designs are simply much better. Mazda, the world's last Wankel manufacturer canceled further development in May of 2009 and production ended June 2012 due to lack of sales. The simple fact remains there is no longer a place for the Wankel KKM design in automobile manufacturing or any other applications.. the design and its concept are now obsolete.
    1
  1998. Absolute Nonsense! 26 of the world's largest and best engine manufacturers and over 100 of the best universities and research institutes spent over a decade, millions of man hours and billions of dollar developing the Wankel engine design. Mercedes-Benz and and General Motors for example both spent over 100 million dollars a year on Wankel research and development. Ford Toyota Porsche Rolls-Royce Nissan Alfa Romeo American Motors (AMC) Citroën Suzuki Yamaha Kawasaki BSA Norton Hercules John Deere Ingersoll and Rand Fichtel & Sachs AG Yanmar Diesel Co. Ltd Daimler-Benz AG Deutz AG. MAN AG KRUPP AG IFA VEB Graupner Savkel All the motorcycle and automotive manufactures already mentioned above plus the heavy truck and Diesel engine manufacturers and the aircraft engine manufacturer Curtiss-Wright marine engine manufacturer OMC. and of course Wankel-NSU which became Audi.. and dozen of subsidiary companies and and partnership companies which combine represent billions of dollars in research and development besides just tiny little Mazda.
    1
  1999. insert homosexual rotard' comments below.
    1
  2000. That is the battery pack for the glow plug.
    1
  2001. The Wankel engine turned out to be a bad choice... no manufacturer even sells them anymore.
    1
  2002. Engines size of a large V-6, power of a small inline 4 and the fuel consumption of a V-10!!!
    1
  2003. Terrible engine.. very unreliable and inefficient.
    1
  2004. SidewaysGts is one of those angry little trolls you hear so much about.
    1
  2005. Wankel engines have a very compromised combustion cycle and generate more CO due to the incomplete combustion
    1
  2006. Wankel engines are inherently less efficient and always produce less power per unit of emissions produced.
    1
  2007. Of course they're not at fault stupid.. they are the victims of rampant, systemic corruption by criminals embedded within the mexican government all the way to the highest level.
    1
  2008. Wankel engines are obsolete because there is no new technology that can fix its fatal flaws.
    1
  2009. 1 ignition per crankshaft revolution
    1
  2010. If you want an engine that self-destructs, has no torque and gets terrible fuel mileage... the Wankel is your only choice... OH Wait! Never mind, they don't make Wankel engines anymore Lol!!!!
    1
  2011. SidewaysGts is one of those angry little trolls you hear so much about.
    1
  2012. Mazda discontinued Wankel engines because people don't buy them... Sales of RX models had steadily declined since 1986 and the last 2 RX models failed to sell enough units to justify production.
    1
  2013. And now he proves he is an angry little troll!
    1
  2014. This month marks the 10 year anniversary of Mazda's decision to kill-off the RX-8, the entire RX brand and cancel further development of production Wankel engines... its been a quarter of a century now since Mazda unveiled a new production Wankel engine.
    1
  2015. A lot of homosexuals in Chicago... the town is full of 'em
    1
  2016. You didn't know that Tesla is the official car of the LGBT community?
    1
  2017. OH! I'm sorry... I didn't know you were still in the closet...
    1
  2018. Unfortunately this is absolutetly true... not even Mazda could make them reliable.
    1
  2019. Not really, per liter they delivered rather poor power and torque.. which is why they have been discontinued
    1
  2020. History Buffs: DAS BOOT
    1
  2021. There is no timing on these engines.
    1
  2022. Low efficiency is why these Wankel engines are obsolete today.
    1
  2023. Wankel engine combustion cycle
    1
  2024. Mazda announced it is now taking orders for delivery in Europe in September, 178 horsepower and 164 lb-ft of torque, The 2.0 liter Skyactiv-X Mazda3 delivers 43.6 mpg on the new European WLTP drive cycle test. No EPA ratings yet but they could be near the 50 MPG mark. prices starting at $23,000 USD. The Skyactiv-X is expected to arrive in the states next year.
    1
  2025. You could buy 5 of these Mazda's for the price of the best range performing EV available on the market.
    1
  2026. That's what wankel engines do more or less... its a very inefficient design
    1
  2027. That is NOT a good car... run away from it as fast as you can.
    1
  2028. The RX-8 sold poorly not just because you could buy a better car for less money, or because it had disappointing torque output and not because it got the worst fuel mileage of any car in its class. The RX-8 sold poorly because it quickly developed a horribly bad reputation for poor reliability and premature engine failures that in most countries Mazda refused to cover under warranty. Today used RX-8s usually sell dirt cheap... because the cost of repairing a damaged engine can easily exceed the cost and resale value of the car. Most of the car you will find for sale need a new engine.
    1
  2029. RX-8 models with automatic transmissions are known to have the worse problems with compression loss and the symptoms associated with engine damage like hard starting, stalling, low power and increased fuel consumption.
    1
  2030. Indeed they are... very unreliable... Efficient? Not really, in fact they have terrible efficiency.
    1
  2031. Replacing a blown engine is not maintenance... its just a horrible engine design.
    1
  2032. Happened to everyone... Mazda had to recall the RX-8 for premature engine failures.
    1
  2033. Horrible BSFC... No, there are no successful Wankel Diesel engines... Wankel engines cannot support the required static compression ratio and the seals are too weak.
    1
  2034. Ernie Brink and Motor1 are fakes
    1
  2035. The Wankel engine was so horribly unreliable that even Mazda dropped that POS engine like a bad habit years ago...
    1
  2036. @Kaguya Houraisan Yes, SUPERIOR in every way... which is why the Wankel failed to replace the reciprocating engine design in any applications and today are obsolete everywhere in the world.
    1
  2037. @Kaguya Houraisan Its not opinion, it is irrefutable facts... something you are either too young, too uneducated or too ignorant to understand.
    1
  2038. @Kaguya Houraisan Yes, the Wankel engine is a shitty design... that is why it is obsolete and reciprocating engines are not!
    1
  2039. @Kaguya Houraisan Immature little trolls like you do not intimidate me... you are a completely ineffectual troll.
    1
  2040. Nah, the Wankel simply did not offer any significant advantages and had way too many problems. Not really, Mazda discontinued the RX brand due to poor sales not emissions or fuel economy, new car buyers just weren't buying them anymore mainly due to there bad reputation.
    1
  2041. Mazda sold very few of these unpopular cars... it was the worst selling RX-7 in the company's history.
    1
  2042. SHOCKING NEWS! Mazda CEO Akira Marumoto has confirmed there will No New Rotary Engine. https://thedriven.io/2019/06/11/mazda-confirms-100-electric-car-model-for-2020/
    1
  2043. THEY DON'T MAKE ENGINES THAT WORK LIKE THIS ANYMORE
    1
  2044. +Flyingdutchy33 Hey! I have a question? can you tell me where I can find a new car dealership selling cars with Wankel engines??
    1
  2045. +Flyingdutchy33 Oh you silly boy! Didn't you know this??? Flat-head engines are just like the Wankel engine... OBSOLETE! LOL!!!!
    1
  2046. +Flyingdutchy33 Instead of childish ad hominem attacks, maybe you could answer my question? Where can I go to buy a new car with a Wankel engine today????
    1
  2047. Not really, Wankel engines are obsolete now because they could no longer compete with reciprocating engines in performance, reliability or efficiency.
    1
  2048. Yes, the Wankel was inferior to the reciprocating engines.
    1
  2049. @Kaguya Houraisan It is not an opinion kid... it is a fact.
    1
  2050. @Kaguya Houraisan Yes, it is a fact... Wankel engines were a commercial failure and are obsolete today because they are inferior technology compared to reciprocating Otto and Diesel engines which are still mass produced in the millions every month...
    1
  2051. Obviously you have very owned one either... The Renesis engine was a horribly unreliable ticking time bomb.
    1
  2052. Overhauling your engine is not "special care" it means you engine is a POS.
    1
  2053. Not very efficient at all, which is why they are no longer made.
    1
  2054. Wankel engines are so inefficient they are obsolete today... even Mazda dropped them like a bad habit years ago!
    1
  2055. Mazda just announced The 2.0 liter Skyactiv-X Mazda3 delivers 43.6 mpg on the new European WLTP drive cycle test. No EPA ratings yet but they could be near the 50 MPG mark.
    1
  2056. Mazda lost 3 billion on the RX-8... 10 mil is just pocket change.
    1
  2057. Of course no one really wants to pay more for something you throw away... its a hard sell.
    1
  2058. Wankel engines are obsolete now so they are really taught much in schools anymore.
    1
  2059. But how would it form a gas tight seal? And how would it allow for the expansion and contraction of the housings? a roller would require some type of bearing to support it at such extremely high rpm... and that would a require some form rigid attachment. And interesting idea... but not a practical or even functional one.
    1
  2060. The RX-8 was the worst RX model ever sold... weak, unreliable engine, hideous styling, built like an cheap plastic garden shed... not even a real sportscar... it was a heavy sedan.
    1
  2061. No, I'm not gay...
    1
  2062. It certainly was nice to see American made mining and railroad equipment...
    1
  2063. Not really, these engine are just extremely inefficient.
    1
  2064. Mazda not anymore... Mazda abandoned Wankel engines years ago
    1
  2065. An LS swap makes this a decent car... the Renesis is terribly weak, horribly unreliable and completely torque-less lump of scrap.
    1
  2066. You are correct... its a type of crankshaft called an eccentric-crankshaft... but works exactly the same.
    1
  2067. Reciprocating engines easily outperform this little 1.2 hp Wankel engine... which is why they were discontinued.
    1
  2068. Sachs made Wankel lawn mower engines (1974-75) but they were discontinued due to the high noise level and poor reliability. https://www.youtube.com/watch?v=zr4gdEGIjnI
    1
  2069. The Wankel engine is obsolete now... its no longer manufactured any where in the world
    1
  2070. Actually all Wankel KKM engines use the same 4-stroke operating principle as the Otto engine.
    1
  2071. Rolls-Royce went bankrupt developing the R-6! It was a massive embarrassing failure that never started or ran reliably... the british government rescued R-R from creditors and nationalize it... the first program cut was the R6 fiasco
    1
  2072. David Garside is a self-promoting crackpot, and a con-man... Norton purchased its Wankel engine from Sachs and promptly went bankrupt producing the inferior Wankel engine.
    1
  2073. BULLSHIT!!! Felix Wankel had NOTHING to do with the development of the Wankel KKM design... HE HATED IT!!! The KKM was the creation of WALTER FROEDE and HANNS PASCHKE... Max Bentele is credited with the greatest improvements to the Wankel design... he was also the first to realize it was a dead-end design.
    1
  2074. But John, Daves designs for Norton were all FAILURES!!! Norton went bankrupt because Garside is a incompetent crackpot!!!
    1
  2075. John than please tell us how many Wankel engines Rolls-Royce sold??? And how much profit was returned on its investment into Wankel engines????
    1
  2076. Sometimes John you sound like you are completely detached from reality... Wankel engines are obsolete because engineers understand they are inferior to other ICE's still mass produces in the millions.
    1
  2077. Someone MADE THAT SAME CLAIM 100 years ago but consumers are still buying ICE cars.
    1
  2078. Elon Musk just made $2.6 BILLION dollars... and is asking for another $55 Billion... makes you wonder who you can trust?
    1
  2079. Do you know the difference between Norway and Saudi Arabia??? Norway doesn't have camels!
    1
  2080. This is not a hand built engine, this is a Graupner model 49-PI engine. It was designed and manufactured by Graupner GmbH. in Germany... these engines were discontinued several years ago do to poor sales.
    1
  2081. All Wankel KKM engines are 4-STROKE and use the exact same 4-stoke operating principle as a reciprocating Otto or Diesel engines.
    1
  2082. And now you will realize Ernie Brink is a fake. Here is a respected peer-reviewed automotive engineering reference source from; Encyclopedia of Automotive Engineering: Engines - fundamentals, Volume 1, Part 1 Chapter 10 Page 532, Section; 2.2.3.2 quote; "Wankel engines work with the four-stroke principle" https://books.google.com/books?id=ANfdCgAAQBAJ&pg=PA532&lpg=PA532&dq=wankel+4+stroke&source=bl&ots=gzrnDiXhUe&sig=wVwxnnTy68GEfgnIl6orujQSUgI&hl=en&sa=X&ved=0ahUKEwiq7aKp9Z7ZAhVP42MKHQRAAsc4FBDoAQg6MAM#v=onepage&q=wankel%204%20stroke&f=false
    1
  2083. Wankel engines are obsolete because there is no way to make them reliable.
    1
  2084. Now this is gun porn.
    1
  2085. No surprise it didn't sell for much... the RX-8 never lived up to its overrated reviews.
    1
  2086. What potential? The Wankel is an obsolete design
    1
  2087. Graupner model 49PI
    1
  2088. These were discontinued from production because they were more expensive, had more parts and less power than comparable 2-stroke RC engines.
    1
  2089. Yes, its poor thermal properties and its irregular shape cause wear and leakage problems internally... No, the Wankel KKM was the only design of its kind to ever be commercially successful... the Wankel only saw limited success and has been obsolete since 2012.
    1
  2090. nitromethane requires a very rich mixture
    1
  2091. Well, they are very unreliable engines and you had to constantly rebuild them... but it is a discontinued engine now... completely obsolete.*
    1
  2092. Felix Wankel?
    1
  2093. Aaah... His father???... Rudolf Wankel
    1
  2094. Heinrich Wankel!
    1
  2095. Felix Wankel's Great grandfather? you're not the sharpest tool in the shed are you lad?
    1
  2096. Did you read your owners manual? Lol! But did you know how to read a label on motor oil for the API rating????
    1
  2097. And you are ignorant if you pre-mix an engine equipped to run metered oil injection... Please stop spreading false and misleading information about pre-mixing if you can't even read a product label son.
    1
  2098. You have to be pretty stupid to run oil that only has an API rating SA when the engine manufacturer requires a minimum API rating of SL.
    1
  2099. Son, at least I can read a manual... you can't even get the right oil in the right hole!!! Mazda calls for an API rating of SL... in the Engine!!! NOT API SA IN THE GAS TANK!!!
    1
  2100. What else do you call some dumbass that puts the wrong oil in his car... all you have to do is read the manual... is that too hard for you boy????
    1
  2101. Hahaha You are a funny guy!
    1
  2102. All Wankel engines are either "3-cylinder" or in increments of 3 eg; 2 chamber Wankel like the Mazda 13B is the equivalent of a 6 cylinder reciprocating engine.
    1
  2103. The Wankel engine died-out because it is not clean, efficient or reliable.
    1
  2104. Which Wankel are you referring to? Only the Wankel DKM-54 was a rotary.. the Graupner is a KKM-57(non-rotary version)
    1
  2105. fyi; there is no such thing as a "radial-rotary" that would be an oxymoron.
    1
  2106. +Timothy Feist The Wankel DKM-54 engine designed by Felix Wankel uses a "Millet type" Rotary layout with a fixed, non-rotation crank-axle, while the KKM-57 designed by Dr Hanns Paschke and Walter Freode uses a conventional non-rotary layout with a normal rotating main crankshaft.
    1
  2107. +Mandernach Luca Wankelmotor? Kreiskolbenmotor? oder Drehkolbenmotor?
    1
  2108. The effect you are describing called Pressure Wave Supercharging has already been developed and marketed in commercial super/turbo-charging devices like the Comprex Supercharger manufactured by the Swiss firm Brown, Boveri & Cie and the Hyprex supercharger developed by the Swiss firm Wenko AG.. The Comprex supercharger can be seen installed on several types of heavy duty Diesel truck engines.
    1
  2109. There is not much information available outside industry publications and engineering journals... a little too technical for your average clickbait youtube viewer with a 30 second attention span.
    1
  2110. The question is would a practical device be possible that actually increases efficiency enough to justify its cost.. the Comprex supercharger increases efficiency but also increases costs.
    1
  2111. Agreed, but if the system does not deliver realistic efficiency gains at a reasonable cost? Its never going to be a viable commercial product.
    1
  2112. Yes, a very inefficient engine design... which is why they are obsolete.
    1
  2113. Not really, they suck which is why they are obsolete.
    1
  2114. and Dr. Walter Froede...
    1
  2115. The RX-9 does not exist... fake rumor.
    1
  2116. Engineering failure
    1
  2117. Just remember Porsche has won Le Mans 19 TIMES!!!! with a reciprocating engine... Audi has won 9 TIMES!!!! WITH a DIESEL ENGINE!!!!! and the FIA never banned Wankel engines... Mazda retired the slow uncompetitive 787b because it could only win if the points leaders all crashed out of the race!
    1
  2118. @caberFeidh The FIA never banned the Wankel engine or the 787B in WSC series or Le Mans... Mazda retired the 787B because it was slow and uncompetitive.. 20 losses in 21 races, No poles, no fastest laps. Mazda announced in 1990 that would retire the 787b after the 91 season and before Le Mans.
    1
  2119. @Caberfeidh The 787B failed to win a championship for Mazda, they lost the 1991 series to Jaguar. There was little incentive to introduce a smaller Wankel engine to meet the new displacement classification. The 767s engine proved it was not reliable or powerful enough to be competitive. and the 787s chassis was outdated. Mazda switched to the Jaguar chassis and the Judd engine... can't beat'em? then Join them.
    1
  2120. You forgot the 3:1 Ratio between the triangular piston and the crankshaft. There is only one combustion cycle per shaft revolution for each housing... it takes 3 revolutions for all six chambers to complete the 4-stroke cycle
    1
  2121. They do not make Wankel engines anymore because they had major reliability issues and a much shorter service life.
    1
  2122. Ernie Brink can you explain to us why your engine does not run either???
    1
  2123. +MetallicReg A FAKE.. a JOKE, a CRACKPOT.
    1
  2124. +MetallicReg Besides the fact that its EVs that remain a niche market?
    1
  2125. +MetallicReg EVs enjoyed a larger market share over a 100 years ago compared to today...
    1
  2126. +MetallicReg Are you suggesting we go back to horses???? Lol!!!! Are you for real????
    1
  2127. +MetallicReg Horses and electric passenger car both fell out of favor because they are inferior and cannot compete with ICE vehicles...Do you live in cave or a hut kid?
    1
  2128. +TheSteamBreaker Yes, he completely failed to make a relevant point.
    1
  2129. +TheSteamBreaker Do you really think Jesus has time to read every comment on youtube???
    1
  2130. +TheSteamBreaker Yeah, but then he rose from the dead 3 days later...
    1
  2131. +TheSteamBreaker My sincerest apologies if you felt your reply deserved a higher priority, but like Jesus I have more important things that require my attention.
    1
  2132. +JohnyG29 Neither invention was actually british, the Stabilator was used on the Wright Flyer and found on many aircraft during WW1. The Jumo 109 -004E was the world's first afterburning turbojet engine.
    1
  2133. Wankel engines are dead because they are inferior to reciprocating engines.
    1
  2134. Just the facts here Richie... the truth will always prevail in the end.
    1
  2135. The Wankel engine is Dead... it is obsolete in the engine manufacturing industry and Mazda cancelled development of production engines in May 2009 and no new prototypes have been seen since 2008. The last time Mazda revealed a new production Wankel engine was over 23 years ago!
    1
  2136. John Burns, None of the UAVs in current U.S. military service use a Wankel engine. Lockheed Martin Stalker battery-electric motor RQ-170 General Electric TF34 turbofan RQ-21 Blackjack 2-cylinder horizontally-opposed 4-stroke RQ-20 Puma battery-electric motor AAI Aerosonde Lycoming-Enya single cylinder 4-stroke Wasp III electric motor RQ-11 Raven Aveox 27/26/7-AV electric motor CQ-10A SnowGoose Rotax 914 piston engine MQ-9 Reaper Honeywell TPE331-10 turboprop MQ-8 Fire Scout Allison Model 250 turbshaft RQ-4 Global Hawk Allison AE 3007 turbofan MQ-1 Gray Eagle Thielert/Mercedes OM668 4-cylinder turbocharged 4-stroke Diesel MQ-1 Predator Rotax 914F turbocharged four-cylinder engine
    1
  2137. There is nothing efficient about the Wankel engine...
    1
  2138. Absolutely, the Wankel is very inefficient design that has also been obsolete for several years...because of its many flaws and disadvantages
    1
  2139. Yes, the RX-8 weak, fragile engine was a major factor in the cars bad reputation for poor reliability a low sales resulted... The engine's lack of torque and poor efficiency scared away the smart buyers, the engine failures, subsequent recall campaigns and class action lawsuits scared away the rest.
    1
  2140. That is why these engines have been completely obsolete in the manufacturing industry for several years... Wankel engine offer no advantages... just disadvantages.
    1
  2141. Actually no, not anymore.. The Wankel engine no longer offers any significant power density, power-per-liter or power-to-weight ratio advantage... in applications were power-to-weight ratios are critical, the gas turbine and the 2-stroke reciprocating engines offer a significant advantage... the gas turbine offer an order of magnitude greater power-to-weight ratio performance than the obsolete Wankel.
    1
  2142. Not anymore... that statement was true in the 1950s when the Wankel engine was first introduced... many automobile manufactures were still producing flat-head engines made from cast iron... There was never any production Wankel automobile engine that produced 800 horsepower.. the most powerful passenger car engine was the Mercedes-Benz M950F which was rated at 400 hp... but it was canceled in 1971. The fact is power-to-weight is really not a critical design requirement for passenger cars and trucks... this is not the case with aircraft yet the Wankel offers no advantages in aircraft applications either.
    1
  2143. What are you on about kid? No one even makes Wankel engines anymore... they are obsolete because they no longer offer any advantages... including power-to-weight ratio.
    1
  2144. Yeah, kid... I doubt you are old enough to drive yet. Power-to-Weight Ratio is not a significant advantage of the Wankel engine design today.. and the Wankel was never successful in any applications where Power-to-Weight Ratio performance was critical...The Wankel has been OBSOLETE in the engine manufacturing industry for several years now because it offers no significant advantages at all.
    1
  2145. Your just some dumb kid that doesn't have the slightest clue what the fuck you are talking about... are you done making a fool of yourself yet?
    1
  2146. That won't even happen... you can't change the shape of the engine, so apex seals will always be prone to damage and premature failures... That is a major flaw in the Wankel's fundamental design... there is no way to lubricate the seals without fouling the combustion chamber with oil.
    1
  2147. Unfortunately that is not the case, 26 of the worlds biggest and best engine manufacturers and nearly 100 universities and research institutes have spent billions of dollars and more than a million man-hours developing the Wankel engine over the past 50 years trying to find solutions to these design flaws... by 2008 all of them had reached the exact same conclusion... the Wankel engine is fundamentally and inherently flawed... it is inferior to reciprocating engines and has been rendered obsolete in the engine manufacturing industry.
    1
  2148. @Josh Schonfeld They had a very bad reputation... a well deserve one too... the horrible reliability and unacceptably short service life was a major factor in the Wankel engines commercial failure and it becoming obsolete in the engine manufacturing industry.
    1
  2149. Obsolete technology, not even Mazda makes these troublesome and very inefficient engines.
    1
  2150. YES..
    1
  2151. Here you go. https://www.google.com/search?q=rotary+engine+hydrolocked+damage&source=lnms&tbm=isch&sa=X&ved=0ahUKEwju98r644LfAhXrHzQIHeTgCL4Q_AUIDigB&biw=1024&bih=522&dpr=1.25#imgrc=QiFrF8Rmj25jPM:
    1
  2152. Here is another photo of hydrolocked damage https://www.google.com/search?q=rotary+engine+hydrolocked+damage&source=lnms&tbm=isch&sa=X&ved=0ahUKEwju98r644LfAhXrHzQIHeTgCL4Q_AUIDigB&biw=1024&bih=522&dpr=1.25#imgrc=c5nJaZY36QLExM:
    1
  2153. Yup... sober-up and learn to pronounce your French words and smart people won't make fun of you so much.
    1
  2154. Turbochargers have been around since the 1930's and they easily spin at 60,000 rpm and can spin as fast as 120,000 rpm.
    1
  2155. They do not make or rate motor oil based on rpm... just pressure rating and lubricity.
    1
  2156. That is a lot slower than a turbocharger spins... and they use regular motor oil for the engine sump...
    1
  2157. The internal components of the Wankel engine only turn at 1/3rd of crankshaft RPMs thanks to the 1:3 ratio of the internal gears... it not that difficult a concept to understand.
    1
  2158. Graupner GmbH. rates this 49PI engine at 1.1 PS(DIN) or around 1 horsepower (SAE).
    1
  2159. +Rick te Kronnie Ernie has either serious substance abuse problems, mental problems or both... you can completely disregard his deranged ramblings.
    1
  2160. Mazda has a thing for backing the wrong engine technology... and then going bankrupt... lets hope that this isn't the case with HCCI technology.
    1
  2161. 0.75 horsepower.... but it has ZERO Torque.
    1
  2162. It doesn't mean he is legally liable... just a huge douche bag.
    1
  2163. Tesla just makes shitty over-priced cars.
    1
  2164. This car is a perfect example of how not to build a 1990's GT coupe... this car was such an expensive flop that Mazda has never again attempted to sell another car in this class.
    1
  2165. All 26 of the original Wankel KKM licensee's (including Mazda) have abandoned it... they are no longer manufactured anywhere in the world today, this is due to the fact that they are inferior to reciprocating engines.
    1
  2166. Lol!!! there is no new RX-8...
    1
  2167. Mazda canceled development of any further RX models in May 2009, and set a date to end production by 2013. A severe lack of sales forced production to end 6 months early in June 2012.
    1
  2168. Not if you are in Europe or Canada...
    1
  2169. When did you canucks change to 60 hertz??? Most countries run 50 Hertz
    1
  2170. I thought you guys were 50 Hertz like the brits and the frenchies Aye?
    1
  2171. The Wankel engine has been obsolete for several years because it no longer offered any advantages over reciprocating engines.
    1
  2172. The mazda 13b is actually a 3.9 liter... and very inefficient too!
    1
  2173. +Justin Durand OF COURSE ITS A CRANKSHAFT YOU MORON... its a type called an Eccentric-Crankshaft it functions exactly the same as any other type of crankshaft but is optimized for higher strength against torsional and lateral flex or distorsion and shorter stroke engines like the Wankel.
    1
  2174. Good luck...
    1
  2175. If you daily drive an RX you do...
    1
  2176. @John Burns Well, not in the old Mazda engines... they reciprocate left and right.
    1
  2177. @John Burns It appears you do not actually understand how the Wankel KKM engine works... would you like me to explain how the eccentric-crankshaft off-set produces a stroke equal to twice the offset?
    1
  2178. Johnny! Just go down to your local Mazda dealer and see for yourself... Wankel engines are dead!!!
    1
  2179. Unfortunately no one has ever sold Felix Wankel's engine design... it was a failure and only a single prototype exists today in the Deutsche Techniks Museum.
    1
  2180. No legitimate engine manufacturer produces the Wankel KKM engine anymore... Wankel engines have become the sole domain of crackpots and con-artist... which one are you Johnny????
    1
  2181. rpm is measured at the crank, so rotor speed is only 6,000 rpm
    1
  2182. Not really, 2-strokes are higher revving, lighter than Wankel engines. 2-stroke engines have fewer parts than Wankel engines and have less thing to go wrong.
    1
  2183. 2-stroke engines are better and are still mass produced, Wankel engines has no advantages and are now obsolete.
    1
  2184. The problem here is you are taking a car that already uses twice as much fuel and creating one that uses 4 times as much fuel... not a very good idea.
    1
  2185. +SidewaysGts Dude. you seriously need to chill out... everyone knows that the Wankel engine had serious disadvantages and that terrible fuel consumption is just one of the reason why they are no longer made.
    1
  2186. Just the facts... so chill out, K
    1
  2187. Just the facts here... Mazda never sold a single Rotary type engine in its entire history... just Wankel engines, the truth is irrefutable, and you you don't intimidate me one bit.
    1
  2188. Childish insults won't prove your point (if you had one) and certainly don't make you look smarter either...
    1
  2189. "More facts: Youre a twat. Shrug" It doesn't get any more childish than that.
    1
  2190. Just the facts here... the truth is irrefutable. You are just not mature enough to accept the truth and still live in a perpetual state of denial.
    1
  2191. You don't intimidated me... you need to accept the truth and move on with your life... attacking me will not bring the Wankel engine back from the dead.
    1
  2192. What is your point? Killing the messenger will not bring back the Wankel from the dead... Nothing you can say to me will change this fact.
    1
  2193. My point is there is nothing you can say to me that is going to bring back the Wankel engine... your efforts are completely futile.
    1
  2194. Nothing you can say to me changes anything... the Wankel engine is dead and there is absolutely nothing you say to me will ever change this fact... if you're angry about you should insult and harass Mazda... I had nothing to do with the demise of the RX brand or the Wankel engine becoming obsolete.
    1
  2195. So why the angry little childish insults... what do you think you will accomplish?
    1
  2196. Your childish insults still won't bring back the Wankel engine... its dead and there is nothing you can say to me that will change this irrefutable fact...
    1
  2197. Childish insults is all you have... how pathetic.
    1
  2198. And you have spent years in denial that the Wankel engine is dead... Attacking me is not going to bring it back son, IT'S GONE!
    1
  2199. The Wankel has been out of production for years... and you are obviously still very angry and in a deep state of denial about it.
    1
  2200. Lets recap, Mazda's board of directors votes to cancel development of production Wankel engines in May 2009, and ceased all production in 2012... a decision I had nothing to do with... Why are you mad?
    1
  2201. Why do you think you can intimidate me with childish insults and harassment? You do not intimidate me in the slightest...
    1
  2202. Mazda doesn't make Wankel engines anymore... not a single legitimate engine manufacture has produced them in years.
    1
  2203. Mazda has been selling engines that blow-up as long as its been in business... some people only care about price, not quality.
    1
  2204. Not at all, Wankel engines use the 4-stroke operating principle exclusively.
    1
  2205. The Wankel engine cannot produce sufficient static compression ratios to burn gaseous fuels like methane efficiently, Mazda used oil injection on all its production engine but the Wankel KKM design uses the 4-stroke operating principle.
    1
  2206. @Cameron Bergman Motor = Engine
    1
  2207. Actually it wasn't... it was so bad it brought the demise of the RX brand.
    1
  2208. Today marks the 6th anniversary of the end of RX production, on Thursday June 21, 2012 at 4:30pm the final RX-8 car ever to be produced rolled off the assembly line, the last RX model to ever be produced by Mazda.
    1
  2209. Mercedes-Benz revealed their HCCI engine over 10 years ago...
    1
  2210. All Wankel engines are 4-stroke
    1
  2211. The Wankel was very inefficient... thats why it is obsolete.
    1
  2212. No, All Wankel engines are 4-stroke.
    1
  2213. Published specs from the manufacturer say only 1.2 horsepower... of course they lose power very quickly with use.
    1
  2214. There is a three-to-one ratio... the internal components rotate at just one third of output shaft speed... slower than many Diesel engines.
    1
  2215. YES, it fits right into the heater blower housing... but its not very reliable on cold days and tends to fill the cabin with smoke!!!
    1
  2216. Famous failures are often remembered for generations.
    1
  2217. You are very welcome, there seems to be so much that has been forgotten... many people are not old enough to remember, most of the information pre-dates the internet and has been lost to the general knowledge.
    1
  2218. Gas? You mean gaseous fuels like LNG or propane? Yes, Wankel engines have been tested and developed to use a wide range of gaseous fuels but unfortunately the Wankel is very poorly suited to extracting the energy contained in these fuels and deliver poor fuel efficiency and higher emissions than reciprocating engine designs.
    1
  2219. The internal components of the Wankel engine only turn at 1/3rd of crankshaft speed... reciprocating engines can also rev even faster.
    1
  2220. Well, an LS swap is all its really good for today... its nothing but an over-priced, unreliable turd... but an LS swap makes it a decent performer if you can buy one cheap with a dead engine... not too hard to find.
    1
  2221. Porsche has won Le Mans 19 TIMES!!! and Audi 9 TIMES!!! WITH A DIESEL ENGINE!!!!_ what is Mazda's excuse?
    1
  2222. @Rxonmymind Mazda's problem was the Wankel engine simply cannot be adapted to use a modern high swirl or "Quench" type combustion chamber, The Wankel's combustion chamber is extremely crude and inefficient compared to modern reciprocating engine which now , all use Pent-Roof or Wedge chamber configurations to reduce HCs and CO before exhaust after-treatment and increase power and fuel efficiency compared to the obsolete Wankel design.
    1
  2223. @Picasso Impaler You do realize this engine runs on nitromethane? The fuel in this engine is highly oxygenated and must run at a much richer mixture ratio.
    1
  2224. @asgeir axel I'm sorry you are not knowledgeable enough to keep up or follow the conversation... perhaps you should stick to watching some fundamental videos for awhile OK kid?
    1
  2225. @Zak Wilson Excellent comment...
    1
  2226. @Valdimer Lucifer A Diesel is an order of magnitude more RELIABLE... which is why no one is surprised by their success in endurance racing.
    1
  2227. @Valdimer Lucifer Actually, the truth is the Wankel engine is very poorly suited to gaseous fuels like hydrogen or methane, because the Wankel cannot efficiently extract the heat energy from these fuel types due to its limited static compression ratio. Mazda's entry into the Norwegian HyNor program was the least fuel efficient of all the hydrogen power vehicles tested, Mazda's entry was rejected from the program and Mazda abandoned its hydrogen fuel research in 2009.
    1
  2228. @Valdimer Lucifer Mazda discontinued all development of Wankel engines in May 2009. The RX-8 HRE and Premacy HRE were cancelled in 2009.
    1
  2229. @Valdimer Lucifer You seem very confused and have a limited knowledge of HCSI engine technology. "burns so fast (multiple times the speed of sound)" DEFLAGERATION is SUB-SONIC in a spark ignition engine. If the air -fuel mixture "Burns" its not supersonic. Wankel engine cannot produce a 20:1 static compression ratio, this is not possible due to the geometry envelope of the engines fundamental design parameters. The Bourke engine is an unproven design that was a commercial failure... there is no evidence to suggest that it is even a practical design... let alone an efficient one... no verifiable efficiency data exist for the Bourke design... nor are there working example available for such testing... just unproven claims.
    1
  2230. Diesel fuel D2 (Fuel oil number #2) has about the same energy per kilogram as gasoline... Diesel engines are more energy efficient regardless of what type of fuel its burning. Not true Diesel engine can and do rev to rpms nearly 8,000 rpm... Do you know why most Diesel engines do not rev over 5,000rpm?
    1
  2231. @Valdimer Lucifer If the Bourke engine was never introduced into the market... then it is not a proven design.
    1
  2232. @Valdimer Lucifer In the real world, practical internal combustion engine designs do not reach their theoretical efficiency limit.
    1
  2233. @Valdimer Lucifer Real efficiency data is collected from production engines tested under long term testing and comparing BSFC data like iso-graphic island charts and EGTs to calculate Carnot Cycle Formula results. What good is an 81% efficient engine if it cannot run for more than 10 minutes????
    1
  2234. @Valdimer Lucifer Then why was the Bourke engine a failure?
    1
  2235. @Valdimer Lucifer You tell me, you are the one trying to claim it never developed beyond a model, which is proven now to be a completely false claim.
    1
  2236. @Valdimer Lucifer Then explain why AMC did not pursue its further development after a full sized engine was built and tested???
    1
  2237. @Valdimer Lucifer No, they just need to deliver real world test data to confirm unsubstantiated claims of higher efficiency and that it is a practical design.
    1
  2238. @Valdimer Lucifer If it was built, exhaustively tested and yet came to nothing? Yes, that would be a failure.
    1
  2239. @Valdimer Lucifer He died young??? Really???
    1
  2240. @Valdimer Lucifer What about the 6,500cc 4-cylinder that was built??? Bourke claimed it produced 200 hp but AMC did not develop it any further.
    1
  2241. @Valdimer Lucifer The Bourke patents all expired in 1957, there is nothing blocked and anyone can copy his designs now... if there was anything valuable there someone would have developed it further by now, the truth is it was a failed concept.
    1
  2242. @Valdimer Lucifer AMC was the fourth largest automaker and sold millions of engines... if they canceled their interest in the Bourke design then there must have been a good reason.
    1
  2243. @Valdimer Lucifer I think you have absolutely no clue what a "Patent" is?
    1
  2244. @Valdimer Lucifer So explain why it was never mass produced ???
    1
  2245. @Valdimer Lucifer If it was such a great idea? Why didn't AMC buy the rights and mass produce them?
    1
  2246. @Valdimer Lucifer A patent is not a copyright... you are confusing two completely different things. A copyright is used to protect intellectual property like books, films or images... not technology hardware like engines, devices or other mechanical or electronic inventions.
    1
  2247. @Valdimer Lucifer The Bourke engine never proved to be better than existing designs and never proved that it could deliver the claims made by Bourke.... so naturally there would no longer be any legitimate development today.
    1
  2248. @Valdimer Lucifer No, its a very outdated and inferior design.
    1
  2249. @Valdimer Lucifer No they are not the same dummy... patents expire after 14 years and cannot be extended to more than 20 years. Copyrights last the lifetime of the author plus an additional 70 years.
    1
  2250. @Valdimer Lucifer Because every single successful internal combustion engine design uses Deflageration... not Detonation. Detonation is a bad thing and should be avoided. The Bourke engine relies on a Scotch Yoke instead of crankshaft instead of a traditional crankshaft arrangement... which has been proven over time to be superior.
    1
  2251. @Valdimer Lucifer IT IS NOT THE SAME, inventors PATENT their designs... they do not COPYRIGHT them as this would be useless against preventing someone from stealing your design idea. If you cannot develop you patent into a profitable product with the 20 years allotted? Your idea was not only a failure but you wasted your time and money having it patented in the first place!
    1
  2252. @Valdimer Lucifer Then please explain why none of the successful reciprocating internal combustion engines use a scotch yoke? All of the commercially successful engines use a crankshaft...
    1
  2253. @Valdimer Lucifer OH! I see... So you're saying that if it works for a Lego® toy model it must be durable enough for real engines???? Interest theory, can you name any automotive or aircraft engine designs based on Lego construction techniques.???
    1
  2254. @Valdimer Lucifer No, because you made the issue of patents a key part of your explanation as to why the Bourke engine has not been further developed commercially... you claimed that patents were the reason... but ALL OF Bourke's patents expired decades ago. YOU SEEMED VERY IGNORANT OF THIS FACT.
    1
  2255. @Hentai tamilan Engineering is not art... it is SCIENCE.
    1
  2256. And you have just been reported for making terrorist threats kid, you better watch your mouth.
    1
  2257. These little engines didn't produce much power for their size and weight and were not very reliable which is why they were discontinued years ago... the Wankel engine is obsolete now.
    1
  2258. My condolences... buy you should have bough a better car, the RX-8 is a POS
    1
  2259. Most of the vaporware scams offering Wankel engines are dead... these systems are now powered by Rotax reciprocating engines.
    1
  2260. Not ones in current U.S. military service, they have abandoned the use of Wankel engines completely. Lockheed Martin Stalker battery-electric motor RQ-170 General Electric TF34 turbofan RQ-21 Blackjack 2-cylinder horizontally-opposed 4-stroke RQ-20 Puma battery-electric motor AAI Aerosonde Lycoming-Enya single cylinder 4-stroke Wasp III electric motor RQ-11 Raven Aveox 27/26/7-AV electric motor CQ-10A SnowGoose Rotax 914 piston engine MQ-9 Reaper Honeywell TPE331-10 turboprop MQ-8 Fire Scout Allison Model 250 turbshaft RQ-4 Global Hawk Allison AE 3007 turbofan MQ-1 Gray Eagle Thielert/Mercedes OM668 4-cylinder turbocharged 4-stroke Diesel MQ-1 Predator Rotax 914F turbocharged four-cylinder engine
    1
  2261. @WALTERBROADDUS The world's number one UAV engine manufacturer only sells reciprocating engines, just over 50,000 UAV and ultralight engines... they abandoned development and production of the inferior Wankel engine decades ago... just like all 26 of the original Wankel KKM licensee's have... including Mazda.
    1
  2262. @WALTERBROADDUS Just the facts here son... Wankel engines are obsolete technology now... it proved to be a massive commercial failure and is now the sole domain of crackpots and investment scams.
    1
  2263. @John Burns Hey Johnny!!! Welcome back to the real world! Have you been by the Mazda dealer to check out those new 2020 RX models yet??? Hahahahaahaha!!!!!!
    1
  2264. @John Burns The voice of the Mazda salesman told me "We don't sell those anymore... the RX line was discontinued long before I started working here"
    1
  2265. @John Burns Johnny you look like a fool right now, you told me Mazda would launch the RX-9 by now... WHERE IS IT????
    1
  2266. NEWS FLASH! MAZDA CONFIRMS NO ROTARY RANGE EXTENDER. https://thedriven.io/2019/06/11/mazda-confirms-100-electric-car-model-for-2020/
    1
  2267. This engine was designed and manufactured by Graupner GmbH who licensed the Wankel engine design directly from NSU in 1967, performance and sales were both disappointing and O.S. bought-out remaining inventory and rights when Graupner discontinued them. O.S.'s parent company (hobico) filed bankruptcy. cheers!
    1
  2268. The Wankel engine is an obsolete technology... all 26 of the original Wankel KKM licensee's have abandoned development including Mazda... the only company committed to building an all Wankel product line now only sells reciprocating engines.
    1
  2269. One THIRD of crankshaft speed. The piston gear-to-fixed gear ratio is 3:1.
    1
  2270. Its not, these engines were horribly inefficient which is also why they are obsolete now.
    1
  2271. A trip down to your local Mazda dealer proves these troublesome obsolete engines are no longer sold... now all we have is fake rumors.
    1
  2272. Rotax GmbH. reciprocating engines dominate the UAV industry... Wankel engines are obsolete.
    1
  2273. None of the UAVs in current operation with the US military (the world's largest customer) have a Wankel engine.
    1
  2274. Mazda stopped producing the RX cars because of their bad reputation for engine failures and poor reliability caused sales to rapidly decline down to nothing.
    1
  2275. Unfortunately Mazda's only success has been limited to cheap, low-end, entry level automobiles... unlike Toyota, Honda and Nissan that were able to successfully break-out into the high-end luxury and performance markets (eg; Lexus, Acura and Infinity.) All of Mazda's attempts to move up-market have failed miserably. The Amati, Enos Xedos, and ɛ̃fini marques were all failures and the entire existing RX brand was canceled in 2009 (production discontinued in 2012) due to lack of sales.
    1
  2276. Mazda sold very few of these unpopular cars... the worst selling RX-7 ever.
    1
  2277. Wankel engines are completely obsolete in the automobile industry and no longer produced anywhere in the world... not even Mazda uses them now.
    1
  2278. Also because Mazda discontinued its brand of Wankel engines formerly known as the registered trademark "Mazda Rotary®".
    1
  2279. Discontinued by Graupner years ago..
    1
  2280. No its not efficient... which is why these engines have been obsolete in manufacturing for several years now. Ernie Brink failed math and never went to engineering school.
    1
  2281. The fuel used in the video was nitromethane... Nitromethane already contains oxygen.
    1
  2282. Yup, the company that made these couldn't sell enough to keep them in production so they were discontinued... 2-strokes perform much better and are cheaper.
    1
  2283. Why do you think it would work better? And how would it reduce emissions?
    1
  2284. So you are unfamiliar with the concept of fuel enrichment as the manifold pressure increases? Forced-induction engines must operate with a richer air-fuel mixture as manifold pressure increases... engines with turbochargers must run even richer than superchargers to lower the EGT (exhaust gas temp.) and keep the TIT (turbine inlet temp.) below a safe limit. Wankel engines due to their lower efficiency require even richer fuel mixtures than piston engines and tend detonate (pre-ignition) and overheat the turbo more easily due to the poor combustion chamber design and higher EGT than piston engines.
    1
  2285. No, all Wankel engines operate on the 4-stroke principle
    1
  2286. Ernie Brink has an imaginary engine... it looks like an engine but doesn't run.
    1
  2287. Ernie Brink why do you lie??? Cameron VanDerHorst is just a young amateur blogger, NOT a real automotive journalist. Motor1 is just a clickbait blogsite.
    1
  2288. Nitro type engines typically need a very rich mixture, with the Wankel design even more so.
    1
  2289. That is why they are no longer made
    1
  2290. Your friends dad was a dumbass...
    1
  2291. Good comment, amateur enthusiasts often incorrectly call this Wankel KKM type engine a "rotary" which incorrect, a Rotary engine is a completely different type of engine.
    1
  2292. Mazda's MX-5 is currently the world's most popular track car... its also the best selling sports car under $50,000!
    1
  2293. Apex seals are why Mazda only sells cars with reciprocating engines now!
    1
  2294. Mazda only makes and sells cars with reciprocating engines now... its time to join the rest of us here in the 21st century... the Wankel engine is obsolete because it could no longer compete against vastly superior reciprocating engines that dominate the performance car industry.
    1
  2295. The only thing that stopped is production of cars with Wankel engines... the Wankel is now completely obsolete in the engine manufacturing industry... the quicker you learn to accept this fact the happier we all can be OK?
    1
  2296. Terrible choice for an aircraft engines... they didn't perform well in RC planes either which is why they were discontinued years ago.
    1
  2297. DEPORT NOW!!!!
    1
  2298. Pop-up headlights were banned in some countries over safety issues.
    1
  2299. You're a jackass that doesn't know shit about automobiles is what you are... Your service manger called and said he has oil change he needs you to do... so shut the fuck up and get back to work boy!
    1
  2300. never gonna happen
    1
  2301. OLD RUMORS BUSTED! MOST RECENT NEWS Mazda CEO Akira Marumoto has confirmed there will No New Rotary Engine. https://thedriven.io/2019/06/11/mazda-confirms-100-electric-car-model-for-2020/
    1
  2302. How would you get the compression and power strokes to work and achieve the 4-stroke cycles????
    1
  2303. Well, the rotary engine was invented by Félix Millet but the Mazda RX-8 has a Wankel engine invented by Hanns Paschke and Walter Freode.
    1
  2304. Unfortunately it turned not to be so genius after all... which is why people stopped buying them and Mazda was forced to stop making them.
    1
  2305. Wankel engines were a colossal failure... they are obsolete now.
    1
  2306. Because it didn't...
    1
  2307. Hahahaha!!! Now that's funny!
    1
  2308. You have to remove the engine from the vehicle and perform an entire engine overhaul, some of the major components are often damaged besides the apex seals and can be expensive to replace.
    1
  2309. Someone says that every year... and it never comes true.
    1
  2310. The worst RX ever made... so bad it killed off the entire RX brand.
    1
  2311. Mazda abandoned development of production Wankel engines in May 2009 and ceased production in June of 2012.
    1
  2312. No official news from Mazda.. they didn't even consider a Wankel engine in their last Concept Car at the Tokyo Auto Show.
    1
  2313. @John Burns BULLSHITE!!! Diesels are not being banned in the EU.
    1
  2314. You have to be high as Fuq to believe EVs are the future... someday he will wake up to reality... broke, or in jail!
    1
  2315. Wankel engine, electric motors are rotary- pure concentric motion, the Wankel's piston(rotor) move in a distinctive planetary orbit
    1
  2316. How would you achieve the compression and power strokes with a square???
    1
  2317. @Dwainpipe21 Well, someone said that exact same thing to me 20 years ago and they were just as wrong then as you are today...
    1
  2318. @Dwainpipe21 Ignorance of science is nothing new, there have always been ignorant people like you since the beginning of time.
    1
  2319. @Dwainpipe21 Indeed, you comments reflect this ignorance of both science and automotive engineering...
    1
  2320. @Dwainpipe21 Because of government mandates... not because of consumer demand.
    1
  2321. A lot of the major flaws in the Wankel engine are inherent to its basic geometry and will never be solved... Not true, if there were any real advantages? Wankel engines would still be in production...
    1
  2322. +Samuel May Yeah, I think your dealer gave you some good shit man... 1982? indestructible? No.. gutless turd with no power? YES!
    1
  2323. +Gary Winthorpe What do you think you will achieve by trying to kill the messenger son? I'm not the one that canceled the Mazda RX brand... MAZDA DID! You just need to learn to accept the truth and move on kid.
    1
  2324. +Samuel May You don't seem to understand even the basic fundamental operation of a Wankel engine son... All Wankel engines operate with a 3:1 ratio between the eccentric-crankshaft and the triangular piston (rotor) the Mazda 13B series for example has a 15mm crankshaft offset with produces a 30mm STROKE, the massively heavy pistons(rotors) must reciprocate 30mm to the left and then 30mm back to right ever 360° of crank rotation. This causes massive torsional stress and imbalance moments on the engine assembly causing flexing and distortion of the shaft and housings and damage to the seals and mating surfaces this is why production engines of this size are limited to around 9,000 (shaft) RPM as the "Rotors" turning at just 3,000 rpm (slower than many Diesel engines) are reaching their operation limits before major damage occurs.
    1
  2325. +Samuel May Complete and utter nonsense! More lies! Wankel engines require higher octane fuel compared to a modern reciprocating engine with the same static or dynamic compression ratio.. it also requires a richer AFR. The difference is that the Wankel is limited to 10.5 or less static compression ratio by the geometry limits of the engine... which is why there a no production Wankel engine using the Diesel Cycle. The Wankel requires higher quality fuel and a richer AFR because it has a very poor combustion chamber design and combustion efficiency, the Wankel cannot utilize a modern high swirl "quench" type chamber architecture.
    1
  2326. +Samuel May The Wankel engine has LOW EFFICIENCY in converting the potential energy in the air/fuel charge and converting it into Heat Energy... this is observed by the low BSFC and higher levels of HC and CO exhaust gas products compared to a typical reciprocating engine. The Wankel is also has extremely Low Efficiency in terms of thermal entropy and heat rejection...converting much less of the heat energy produced into mechanical work (power)... more of the heat is lost, wasted through the exhaust and cooling system than a typical reciprocating engine... this is observed by the Wankel's higher EGTs and LOWER IMEP and BMEP... its also why the Wankel generates LESS TORQUE per liter of displacement or pounds of fuel consumed and why Wankel engine were never used in large heavy duty type vehicles.
    1
  2327. +josepla yer21 A video of your neighbors car? You're not old enough to drive yet kid.
    1
  2328. @joe Money That is only because they don't produce any torque... the only thing they are designed to do is lose compression at 50k miles
    1
  2329. @joe Money The Wankel engine's inherently poor mechanical efficiency and torque/power curves make it completely unsuitable for everything but the lightest duty vehicle applications... and its terrible fuel efficiency and unreliability made completely unsuitable for constant rpm applications like aircraft or generators. The Wankel engines lack of usable torque is why it was never successful in vehicle production and is now totally obsolete in automotive engine manufacturing industry.
    1
  2330. Yes, the company that made this engine was Graupner GmbH. who was one of the 26 original Wankel KKM licensee's in the 1960's... the company only bought the rights to develop model engines limited to 3 horsepower or less. Graupner discontinued these engines many years ago, all 26 companies including Mazda have discontinued selling Wankel engines.
    1
  2331. @Emmanual Grattan You are very welcome sir, Happy Holidays!
    1
  2332. Just the facts here son, you must be in a deep state of denial and one of those folks that is not accustomed to being told the truth.
    1
  2333. Good point, its a common myth that Wankel engines can rev higher than reciprocating engines... which is simply not true.
    1
  2334. Mazda just announced The 2.0 liter Skyactiv-X Mazda3 delivers 43.6 mpg on the new European WLTP drive cycle test. No EPA ratings yet but they could be near the 50 MPG mark. They are not out yet but expect to see them in European showrooms in September.
    1
  2335. Your bother must have assembled the model incorrectly... because the Wankel engine fires each housing only ONCE per crankshaft rotation.
    1
  2336. You sound very angry... don't deny it like you deny the Wankel is dead.
    1
  2337. Sure doesn't sound like it... you seem very bitter and disturbed.
    1
  2338. Run along angry little troll... you are bitter and angry at Mazda... not me.
    1
  2339. Mazda no longer sells cars with Wankel engines... I'm just stating the facts.
    1
  2340. +Orion Loranzo He is right though... those engines were total garbage... more power but far worst efficiency and much lower reliability all with a ridiculous price tag... that is why they were discontinued by Mazda decades ago.
    1
  2341. +Andrew It still doesn't change the fact that Mazda no longer sells any car with a Wankel engine.
    1
  2342. +Andrew No fact could be more easily proven than simply going down to your local Mazda dealer's showroom... you will not find ANY NEW CARS with a Wankel engine.
    1
  2343. +Andrew You seem extremely bitter that Mazda discontinued Wankel engines... but the truth is no automobile company can stay in business selling cars that no one wants to buy. Sales of Mazda's RX brand were in steady DECLINE since 1986 and by 2008 cars were starting to sit in showrooms unsold and piling up in storage. Mazda's massive Ujina #2 RX-8 assembly line was sitting idle except for just 4 hours PER WEEK bleeding the company dry with lost development and production costs.
    1
  2344. +Andrew Sounds like you are not as nostalgic for 1960's technology as you are for 1960's prices... My advice to you is if you cannot afford to buy a new car that you like... find a better job
    1
  2345. +Andrew Whats was your point Andrew? Was someone else here arguing that Subaru doesn't make reliable long lasting cars???
    1
  2346. +Andrew Are you sure you weren't reading an article from an amateur blogsite like "Motor1" or "A1Auto"??? these non-credentialed "news" sites are filled with fake "clickbait" headlines that are posted because they are guaranteed to produce a lot of revenue generating "hits" to their blog page.
    1
  2347. +Andrew I was around back when experts still believed that the Wankel engine was going to completely replace reciprocating engines... I have been fascinated with the M950F and the SCORE programs for decades... if anything I'm a little sad that the Wankel turned out to be a colossal failure and all of this engine research is now completely forgotten. What does bother me is brainless, uneducated amateurs regurgitating false urban myth, fake rumors and outright lies about the Wankel engines that do not exist and never will... because they do not understand or accept the fact that the Wankel as commercial production engine is now complete dead. Wake up kid, you still have a lot to learn yet.
    1
  2348. +Andrew I'm not sure what your experiment is supposed to prove son... we were discussing technology and features of NEW and FUTURE vehicles... I personally love old cars and own several of them that I have partially or fully restored... some of my vehicles have over 400,000 miles on THE ORIGINAL ENGINE.. and still pass emissions testing here in California (the strictest in the world). We were discussing the fact that Mazda NO LONGER sells cars with Wankel engines because they are OBSOLETE in the auto manufacturing industry, why is this fact so difficult for you to accept?
    1
  2349. +Andrew Where is the link to the official Mazda statements??? Where is the new engine? The articles doesn't give any quotes, references or verifiable facts... I'm sorry but that is not proof... just more of the sme old false rumors we have been getting for over 10 years.
    1
  2350. +Andrew A real announcement is followed up by details, photos and a reveal of the new engine... The Skyactiv-X engine expected to go on sale at the same time has already been displayed and even test driven by the press... if there is a Range extender Wankel engines coming in 2020??? WHERE IS IT??? We should have seen a prototype by now.
    1
  2351. +Andrew Real upcoming models and engines can be seen, examined in their prototype and pre-production form and even test driven by the press before release, imaginary vehicles and engine cannot because they do not exist. https://www.caranddriver.com/reviews/2019-mazda-3-with-skyactiv-x-compression-ignition-gas-engine-prototype-drive-review
    1
  2352. The Renesis engine is a lot worse than "a bit fragile..." and as performance cars go... Mazda sedans are not that impressive.
    1
  2353. Just the facts here kids.. these engines are WANKEL engines, and by the way... you probably wouldn't know a Rotary engine if one was dropped on your foot!
    1
  2354. @cicobee Your'e funny man... I love your sarcasm!
    1
  2355. @cracked emerald They are imperfect engines... which is why they are no longer used in any major professional racing series.
    1
  2356. @Matt Evans The FIA NEVER BANNED the Mazda 787B or Wankel engines... this is a false urban myth. Then why was the 787B so slow and uncompetitive? The Mazda 13B series engines have a total, true displacement of 3.9 liter... Most Motorsports sanctioning bodies use the 2X conversion formula to calculate Wankel engine displacement at 720° making the 13B a 2.6 for comparison purposes. You should learn some basic engineering and engine design before you make foolish comments.
    1
  2357. @Matt Evans Mazda did not discover anything new, it purchased the manufacturing rights for the Wankel KKM engine design from NSU Motorenwerkes GmbH. in 1960... it had no automotive engine designs of its own prior to this time. Not anymore, Mazda cancelled development in May 2009 and discontinued production in June 2012.
    1
  2358. Wankel engines are no longer used in any major professional or world class motorsports series.
    1
  2359. @Vinny V Could've fooled me kid... There is a lot more to learn about Wankel engines than what was shown in this fan boy video. Don't look at your own comments??? Sounds like you are the one trolling here son...
    1
  2360. No, unless you want to destroy your housings...
    1
  2361. ONE combustion per crankshaft rotation
    1
  2362. Wankel engine are obsolete these days due to all the fatal flaws that could not be fixed.
    1
  2363. That's exactly why the Wankel is obsolete now.
    1
  2364. The Wankel engine is obsolete today because it was a very dirty and inefficient engine design.
    1
  2365. This is a WANKEL engine and the have inherently poor reliability and efficiency problems... no amount of maintenance will ever solve these fatal flaws... which is why these engines are obsolete today.
    1
  2366. WRONG! Wankel never owned the rights to the KKM-57 engine design. The rights were owned by NSU Motorenwerkes GmbH.
    1
  2367. Absolutely FALSE! 26 of the world's largest and best engine manufacturers licensed the Wankel KKM from NSU including. Mercedes-Benz General Motors Ford Toyota Porsche Rolls-Royce Nissan Alfa Romeo American Motors (AMC) Citroën Suzuki Yamaha Kawasaki BSA Norton Hercules John Deere Ingersoll and Rand Fichtel & Sachs AG Yanmar Diesel Co. Ltd Daimler-Benz AG Deutz AG. MAN AG KRUPP AG IFA VEB Graupner Savkel Curtiss-Wright OMC Mazda NSU Motorenwerkes GmbH. became Audi.. which is part of the Volkswagen Groupe which still owns any remaining rights to the design and its name.
    1
  2368. BULLSHIT! All Wankel engines suffer from the same fatal reliability flaws that plagued the design right up until the design became obsolete in 2012. WRONG! The NHTSA recall investigation of Mazda's RX premature engine failure complaints found no link between owner abuse, neglect or lack of maintenance. Mazda did not challenge the NHTSA's findings and voluntarily launched a recall and refunded effected owners.
    1
  2369. An interesting theory but completely untrue! 26 of the world's largest and best engine manufacturers and over 100 of the best universities and research institutes spent over a decade, millions of man hours and billions of dollar developing the Wankel engine design. Mercedes-Benz and and General Motors for example both spent over 100 million dollars a year on Wankel research and development. All research of the Wankel KKM design has found conclusively that its Carnot Thermal Efficiency Limit is fundamental and inherently lower than that of current internal combustion engines still mass produced today. Another serious fatal flaw that has rendered the Wankel obsolete is its extremely low combustion efficiency limit, as the Wankel cannot support a modern high efficiency "Quench" or "High Swirl" combustion chamber architecture. This is also directly related to the designs extremely poor exhaust emissions, low reliability and shorter service life.
    1
  2370. If you would like to learn more about Wankel KKM engines, why they are less reliable or why they are obsolete? I would be happy to share some more facts and information with you. Cheers!
    1
  2371. Its running on nitromethane which requires an extremely rich mixture to run... the Wankel has a very poorly designed combustion chamber that offers very low combustion efficiency... it is also why they are obsolete today.
    1
  2372. @David Elliot British spies like Klaus Fuchs STOLE implosion technology from the U.S.A. It was not only illegal for the US government to share nuclear secrets with UK, the Labor party government was infested with Soviet spies... it was only after the UK proved its nuclear programs were secure did the US begin to share technology with the brits.
    1
  2373. @David Elliot An interesting theory but you seem to omit the fact that the United States tested a atomic bomb 7 years before the british did... that huge lead in technology is rather difficult for you to so easily explain away isn't it???
    1
  2374. The Wankel engine is obsolete and can not be adapted to Skyactiv-X technology either.
    1
  2375. You obviously don't know much about Wankel engines or Skyactiv-X technologies.
    1
  2376. Mazda only makes reciprocating piston engines...
    1
  2377. There are a lot of false urban myths and misinformation out there that is really disturbing... the Wankel engine is an outdated and obsolete engine that died-out because it simply cannot be adapted to utilize the modern technology that it needs to make it clean, efficient and powerful enough to compete with the vastly super reciprocating engine types mass produced in the millions today.
    1
  2378. Despite all the unsubstantiated blogsite rumors and bizzare comments from disgruntled Mazda employees... its no secret that Mazda is no longer in development of any new production Wankel engine... Mazda's board of directors voted in May 2009 to cancel all further development of commercial production engines and ordered all production to cease by 2013.... The very last series production engine was assembled on June 21st. 2012. The RX engine assembly facility at Ujina #2 was dismantled in late 2013 to make way for a new Skyactiv-G reciprocating engine plant. Mazda has not revealed any new engine prototypes in 10 years and they have not unveiled any new production engine in 23 years... if you think Mazda is going to bring them back? You are very naive indeed sir.
    1
  2379. Skyactiv-G and Skyactiv-X technology requires high static compression Ratios... anyone familiar with Wankel engine should know that this is simply not possible because of the Wankel KKMs seriously flawed and limited combustion chamber geometry, CRs above 12.5:1 cause serious disruption of proper ignition flame propagation and deflageration making the designs poor combustion efficiency issues even worse. Mercedes-Benz exhaustively studied and developed GDI fuel injection systems with the Wankel engine in the late 1960s and found the CRs too low to effectively adapt Stratified Charge Mode Combustion and several other manufactures such as Rolls-Royce, Deutz, Yanmar, MAN, Krupp and John Deere studied Direct injection Stratified Charge operation with the Diesel Cycle and all failed to produces a commercially viable engine for these exact same reasons. Mazda's Skyactiv-X technology utilizes a modified Miller Cycle and variable valve timing in order to actively control Dynamic Compression Ratio something not possible in a fixed port induction design such as the Wankel KKM so any suggestion that Mazda is working on a similar system for the Wankel engine is simply ridiculous and without any technical merit.
    1
  2380. The only one making themselves look like an idiot is you buddy... you clearly have no fuckin clue what you are talking about...Wankel engines are an obsolete dead-end technology that even backwards little companies like Mazda even abandoned several years ago....
    1
  2381. You obviously do not understand how this new HCCI technology works if you think it can be adapted to the Wankel concept... perhaps you should go back to playing video games kid.
    1
  2382. You are wrong kid, and you just embarrass yourself by pretending otherwise.... your comment is not funny, its just stupid and sad.
    1
  2383. NO
    1
  2384. The RX-8 was a fucking shed... you need to get out and drive some real performance cars and see what you have been missing.
    1
  2385. Maybe for a cheap Japanese sedan... but the RX-8 is not a great handling sports car.... its not even a sports car.
    1
  2386. Mazda fans overwhelmingly prefer the MX-5 as a great handling sports car... in fact, its also the world's best selling sports car under $50,000.... while the RX-8 on the other hand was discontinued due to lack of sales.
    1
  2387. Nothing will make a Wankel engine reliable.. its a flaw in the very basic design
    1
  2388. I said quote; "they can never achieve energy density that can match liquid hydrocarbon fuels" Which is a true statement.
    1
  2389. EVs have been around for over 100 years remember? and they are still expensive and have poor range performance compared to cars that use liquid fuels.
    1
  2390. Some said that 100 years ago too... and they were just as wrong as you are now.
    1
  2391. A Baker Electric Runabout model weighed less than than the Nissan's battery, it would probably collapse under the weight of Leaf's battery pack... of course it would still only have a top speed of 25 mph because the Baker had only a 3/4 horsepower motor. And of course lets not forget a 700 mile range is not very impressive it takes you 2 1/2 half DAYS to travel that distance!
    1
  2392. 200 mile range is not anywhere near to matching the range of a liquid fuel cars... not even close, electric cars must comply with the same safety regulations and offer the same equipment and features a s ICE cars if they are going to have any growth in the car market. They will remember that in 2018 less than 1% of cars were plug-in electric.
    1
  2393. EVs will never have the range or recharge rates to match conventional vehicles... they suffer from the exact same fatal flaw they have always have... rechargeable batteries are inferior in performance to liquid fuel vehicles... and EVs cost more, a lot more... not less.
    1
  2394. There certainly is... and you seem very ignorant of this fundamental flaw that effects all rechargeable battery technologies... there does not exist, any (stable) Elements on the Period Table which have the required number of free electrons in their valance to match the Specific Energy density of liquid fuels like hydrocarbons. The Laws of Electro-chemistry do no allow this to ever be possible unless you discover a completely new stable element with a significantly higher principal quantum number.
    1
  2395. Thank you for conceding you were wrong...
    1
  2396. Electric motors are not the fatal flaw in EVs... THE BATTERIES ARE.
    1
  2397. No, just someone that know much more about automobiles and the automobile industry than you...
    1
  2398. "The 620 mile Roadster doesn't use any radical new battery technology," It doesn't exist as a real car either....
    1
  2399. 1,440 lbs vs. 56 lbs demolished your argument a long time ago son.
    1
  2400. Stef G. The truth is Toyota makes more Camry models in one month that all the EVs produced in the world in a whole year... I think you live in a pathetic, delusional fantasy world of ignorance. If you really think EVs will ever replace internal combustion? You still have a lot to learn about the automotive industry and why EVs have remained a tiny niche market for over 130 years.
    1
  2401. A "Gas tight" seal is one of the difficult things to achieve in the Wankel engines and remains a critical flaw.
    1
  2402. Actually every Wankel engine uses the 4-stroke operating principle... each of the 3 separate chambers require 3 crankshaft revolutions to complete all the 4 cycles of a internal combustion engine... So in short, not like a 2-stroke at all.
    1
  2403. The triangular piston (or Rotor) and the eccentric-crankshaft turn at different speeds with a 3:1 gear ratio... it takes 1080° or 3 full revolutions of the crankshaft for the rotor to complete 360° or one full revolution... So all Wankel are 4-Stroke in their mode of operation.
    1
  2404. Its glow plug ignition, running on nitro-methane... a very rich AFR is required.
    1
  2405. The Wankel has only one combustion cycle per revolution.
    1
  2406. Low efficiency, obsolete technology.
    1
  2407. Doug is the type of guy that knows these engines are a ticking timebomb... just one rev away from chewing-up an apex seal.
    1
  2408. There is nothing else that can replace internal combustion... so they will just continue to improve.
    1
  2409. There is no safe, practical or effective technology that can replace internal combustion which is why engine manufacturers continue to invest in improving ICE efficiency.
    1
  2410. I'm being completely serious, Mazda is not the only manufacturer pouring millions of dollars into HCCI, Turbo-Compound and GDI technologies... the car of the future will be cleaner, more efficient and powered by an advanced technology internal combustion engine.
    1
  2411. Not really, a reciprocating 2-stroke would be much better... which is exactly why they are still made and the Wankel engines is dead.
    1
  2412. @Lexington & Concord Ernie really is a worthless waste of time... his stupid engine does not even run!!!!
    1
  2413. Charles Kettering did it all on his own... not the oil companies
    1
  2414. Yeah, but you wake up everyday in Norway... is it really worth it?
    1
  2415. +Rusty Pudder Of course its to generate revenue... don't be naive.
    1
  2416. +Rusty Pudder Do you mean Energy efficiency? Not true. Can you be more specific? Per mile driven? Per mile/ton? What is you reference? But Norway does not have the same strict emission regulations as the U.S.? Cars in Norway produce more exhaust emissions. Electric power is heavily taxed in the U.S. over 30% in some states, here in California almost 50% of electric power is generated by fossil fuels and only 15% from renewables. New Hydro-electric projects are essentially banned in California and most U.S. states due to the unacceptable environmental impacts of such massive, destructive projects.
    1
  2417. Martin Test Bullshit! Norway is decades behind and does not have comprehensive vehicle emissions testing regulation like the U.S., Japan and Germany and only later adopted EU standards for new cars.
    1
  2418. Martin - Test- "The norwegian society is far more advanced than the american one..." Then why is Norway's biggest air pollution source from wood burning stoves???? Lol!!!!
    1
  2419. Mazda only makes cars with reciprocating engines now... R.I.P. (rust in peace) Wankel engine 1964- 2012.
    1
  2420. The Wankel engine was never banned from Le Mans... The Mazda 787b did not finish in record time... Mazda retired it because it was very slow and was not competitive.
    1
  2421. Yes, Mazda announced in 1990 that it would retire the 787b after the end 1991 season (before the 1991 race at Le Mans). The FIA never banned Mazda or the Wankel engine.
    1
  2422. Seriously? You don't know what the FIA is??? Are you like 12 years old or something?
    1
  2423. Why do stupid people like Mazdas so much????
    1
  2424. I didn't see any rotary engines... just a tiny little Wankel KKM engine
    1
  2425. Buddy use you brain, this little Wankel motor was made Graupner GmbH. not Mazda... both companies made Wankel KKM engines... not the DKM. learn to identify your Wankel engines son.
    1
  2426. You're the one that needs tutoring son, in engineering.
    1
  2427. Do you not know the difference between a Wankel KKM and a Rotary?
    1
  2428. The gears that link the triangular piston to the housing and causes it to rotate produces a 3:1 ratio
    1
  2429. BEVs will never replace ICE cars...
    1
  2430. It does? HOW? Then explain why have all the major manufacturers dropped the idea of range extenders?
    1
  2431. Yes, Wankel engines are very inefficient and dirty... it also why they are not made anymore.
    1
  2432. Mazda discontinued Wankel engines because people don't buy them... Sales of RX models had steadily declined since 1986 and the last 2 RX models failed to sell enough units to justify production.
    1
  2433. Quick question Ian, were you shooting full power submachine gun loads (+P+) or just the standard 9mm ammo??? Thanks!
    1
  2434. yeah, if you were 8 inches tall...
    1
  2435. So does Isaac Rodriguez...
    1
  2436. Yes, The Wankel KKM engine design offered very little in the way of efficiency which has a lot to do with why the design became obsolete.
    1
  2437. Liquid Piston is a scam... a vaporware investment scheme
    1
  2438. All Wankel KKM type engines use the same 4-stroke operating principle as the Otto type engine. each of the three combustion faces completes all 4-strokes just a a 3-cylinder reciprocating engine would, the only difference is the Wankel requires 3 rotations to complete its firing order instead of just 2 revolutions for a reciprocating 4-stroke engine.
    1
  2439. All Wankel engines utilize the same 4-stroke operating principle as the Otto engine
    1
  2440. +Jake Garrett Jake, that stupid old myth was dispelled years ago when the NHTSA launched its investigation into the extremely high number of pre-mature engine failures being reported. The NHTSA found NO LINK between bad maintenance or abuse. Mazda did not challenge the findings and recalled the Renesis sold in the United States.
    1
  2441. +Jake Garrett That old wives tale dates back to old cars with poorly functioning carburetors and just doesn't hold water when discussing fuel injected cars...carbon deposits are the direct symptom of mis-fires due low compression and damaged seals... If your engine is suffering from carbon build up you either have a serious malfunction in your ignition or fuel system or the engine has suffered compression loss or damage to the seals.
    1
  2442. +Jake Garrett The Wankel KKM was plagued by several major inherent design flaws which is why the design is now obsolete.
    1
  2443. +Jake Garrett Carbon build-up is a symptom of low compression... not the cause. The primary mode of failure of the apex seal is caused by its inability to maintain a proper gas seal during certain operating conditions such as thermal and harmonic distortion and pre-ignition caused by the Wankel's horrible combustion efficiency.
    1
  2444. +Jake Garrett Mazda DOES NOT RECOMMEND pre-mixing oil into the fuel system, this is not only ineffective in prolonging the life of the apex seals it can cause serious damage to the seals and other components. Mazda engineers development oil injection for all its production engines for reasons you seem to fail to understand... because it is the most accurate and effective method to provide the correct amount of lubricating oil... there is no advantage to adding excess oil... too much oil is just as detrimental as too little oil.
    1
  2445. The only problem, it wasn't a real sports car and the engine was a time bomb.
    1
  2446. The Renesis was a very fragile time bomb... Mazda replaced more engines under warranty than the number of cars it sold...
    1
  2447. +Jake Garrett Well son, thats just because you don't know very much about engines.
    1
  2448. +Jake Garrett Thanks for proving my point! Lol!!!! You're not a very good liar but your comments are good for a laugh!
    1
  2449. +Jake Garrett Your comments are all the proof I need to see... no one as ignorant as you could have an engineering degree...
    1
  2450. +Jake Garrett First of all, the myth about "red lining" you engine is nothing but an old wives tales that dates back to the days when RX cars still had carburetors (really bad carburetors) This also has absolutely NOTHING to do with thermodynamic entropy or heat rejection... a real engineer would knows this.
    1
  2451. +Jake Garrett Its called Thermal distortion... and it perfectly explains why engines with round cylinders and pistons are vastly superior in reliability and service life, the Wankel KKM design's inherent geometry is one of its greatest flaws.
    1
  2452. +Jake Garrett Clearly you do not have the slightest clue regarding the primary failure mode of an apex seal... Carbon is not the cause of apex seal failure... it is in fact a common symptom that damage and the resultant loss of compression pressure has already occurred. All of the myths regarding carbon deposit abatement makes about as much common sense as applying sunscreen on a malignant skin cancer tumor.
    1
  2453. +Jake Garrett Wankel KKM engines have never been able to reliably reach mean service life averages anywhere near 200,000 miles without serious damage or compression loss. The poor combustion efficiency and the inherently weak design of the seals is the direct cause of premature compression loss... this is not in anyway related. (a part from damage resulting from a failure of the lubrication system) The primary failure mode of apex seal failure is damage due to BRISANCE and ABLATION
    1
  2454. +Jake Garrett MAZDA DOES NOT RECOMMEND PREMIXING THE RENESIS or any other production RX engine... This fatuous, superstitious practice is not only without merit it can cause serious engine component damage including severe damage to the apex seals under certain operating conditions.
    1
  2455. +Jake Garrett All modern engine lubricating oils (including those specifically recommended by Mazda are classified as ASHLESS if you do not understand what this means should should stick with the manufacturers recommended fluids and service procedures because you have no business giving advice about automotive lubricants.
    1
  2456. +Jake Garrett More completely unfounded, irrational myths... as long as your engine is equipped with the proper oil filter and is changed according to the manufacturer's recommended service interval there will be no more chance of "debris" being injected through the OMP than there is possible being injected through a fuel injector... Myth Busted!
    1
  2457. +Jake Garrett Tampering or disabling the factory equipped Oil Metering Pump system is monumentally DUMB... especially if it is tampered with by someone with as little knowledge or experience as yourself... Do you know why?
    1
  2458. +Jake Garrett Engine lubricant manufacturers develop 2-stoke motor oil FOR 2-STROKE ENGINES... the Wankel KKM is not a 2-stroke... its basic design, operation, and lubrication system is significantly DIFFERENT than that of a typical Benz Type 2-Stroke engine.
    1
  2459. EXCELLENT! thumbs up!
    1
  2460. The Wankel has more moving parts than a comparable reciprocating 2-stroke. All Wankel engines are 4-stroke but suffered from very poor fuel economy. 2-strokes are smaller and lighter. Gas turbines offer significantly better power-to-weight ratio performance which is why Wankel engines are obsolete.
    1
  2461. Not really true, the last production Wankel engine was the Mazda Renesis in the RX-8 and it had over 235 moving and seal related parts and was very unreliable. They still make reciprocating 2-stroke engines but Wankel engines are obsolete because they do not offer any advantages over reciprocating piston engines.
    1
  2462. Wankel engines are not similar to 2-stroke engines, all Wankel engine used the exact same 4-stroke operating principle as the Otto Cycle engine. Do you understand how the Wankel KKM type engine works???
    1
  2463. +The Purdy channel Ethanol and Ethanol blended fuels have been around for over 100 years and are available in dozens of countries including the US, Canada, Brazil, China, Thailand, India, Australia and several European countries.
    1
  2464. @Arne Maeschaelck A very interesting, yet obsolete technology that is no longer manufactured anywhere in the world today... the Mazda RX brand was discontinued years ago!
    1
  2465. @Arne Maeschaelck I'm simply pointing out the fact that the Wankel KKM design is OBSOLETE today because it is technically INFERIOR to comparable reciprocating engine designs that the Wankel engine failed to replace.
    1
  2466. @Arne Maeschaelck A lot of people enjoy obsolete, outdated and antique engines too... It is fascinating to learn why the Wankel engine is dead and why it was an commercial failure.
    1
  2467. @Arne Maeschaelck Mazda was just one of 26 Wankel KKM licensee's... they all have (including Mazda) have abandoned the design.
    1
  2468. @.SpiinDeX Then why do Wankel engines in general use twice as much fuel as reciprocating engines.
    1
  2469. @.SpiinDeX Wankel engines have half the Carnot efficiency and Double the BSFC of reciprocating engines. Wankel engines are obsolete because they waste fuel and are horribly unreliable.
    1
  2470. @Error A turbocharger will only increase Dynamic Compression and cannot increase ambient air temperature... only intake manifold temperature. Modern turbocharged cars use intercooler/heat exchangers to lower the charge temperature (including Mazda). High charge temperature is bad, and leads to pre-ignition/detonation (which is more prevalent in the Wankel do to its poor chamber design) and dramatically decreases efficiency, produces very high exhaust emissions and damages the engine severely. Turbochargers have several limitations... such as turbine inlet temperature, and net efficient gain. The Wankel is less efficient, less reliable and creates more exhaust emissions in turbocharged applications than reciprocating engines, the Wankel produces significantly higher EGTs and requires more fuel consumption (boost fuel enrichment) to prevent damage to the exhaust turbine and apex seals.... the Wankel is less thermally efficient so it's also less fuel efficient in a turbo application than reciprocating engine types.
    1
  2471. @Error A turbocharger will only increase Dynamic Compression and cannot increase ambient air temperature... only intake manifold temperature. Modern turbocharged cars use intercooler/heat exchangers to lower the charge temperature (including Mazda). High charge temperature is bad, and leads to pre-ignition/detonation (which is more prevalent in the Wankel do to its poor chamber design) and dramatically decreases efficiency, produces very high exhaust emissions and damages the engine severely. Turbochargers have several limitations... such as turbine inlet temperature, and net efficient gain. The Wankel is less efficient, less reliable and creates more exhaust emissions in turbocharged applications than reciprocating engines, the Wankel produces significantly higher EGTs and requires more fuel consumption (boost fuel enrichment) to prevent damage to the exhaust turbine and apex seals.... the Wankel is less thermally efficient so it's also less fuel efficient in a turbo application than reciprocating engine types.
    1
  2472. @Error It would seem there are many things you do not understand, How can you really care if you are unwilling to understand something as important as why the Wankel engine was a commercial failure? The Wankel engine design is inherently inferior to the reciprocating engine types in every significant respect... all the engineering in the world is not going to bring it or the RX-7 back...
    1
  2473. @//Project Grassroots Fuel is injected during the intake stroke... just like any 4-stroke, spark ignition engine... you cannot inject any fuel before the intake port is uncovered. The fuel is injected before the start of the compression stroke... because the compression stroke does not begin until the intake port is closed.
    1
  2474. @Kim Brokaw Yeah, 11MPG really sucks!
    1
  2475. @IfYouDisagreeYouAreWrong TRUE! Good point... and lets add that the best handling cars in the world (Formula 1) do not have 50/50 balance... which basically dispels this false RX-8 myth once and for all.
    1
  2476. @tim9lives They don't make new Wankel engines anymore... Mazda discontinued production back in 2012.
    1
  2477. @tim9lives Gary is just mindlessly repeating a common urban myth... pre-mixing a Wankel engine with spark ignition is a really really bad idea... which is exactly the engineers at Mazda designed all their modern engines to only use metered oil injection.
    1
  2478. @Burt Habrad Any motor oil that burns clean is not a very good lubricant... which is why getting the right amount to the right places is so important.
    1
  2479. @Razor 1uk If the carb settings were "f**ked" it wouldn't run... The Wankel KKM is a 4-STROKE and uses the same 4-stroke operating principle as any Otto Cycle engine... tuned-exhaust pulse assisted exhaust scavenging is not required... although these little engines can certainly due with a good muffler due to the high sound pressure level.
    1
  2480. @Stagger Lee Wankel engines are obsolete now, no legitimate engine manufacturers are making them or racing them.
    1
  2481. @Tim Schutte Not really, Graupner and Mazda both became NSU-Wankel KKM type engine licensee's in the 1960's, the RX-8 certainly does not burn all the fuel because it has a very inefficient non-quench type combustion chamber... what the RX-8 has is a large after-treatment catalytic converter to burn the remain hydrocarbons although much of the heat energy is wasted which is what causes the poor fuel efficiency.
    1
  2482. @Brother Juggernaut Absolutely, catalytic converter over-heating and pre-mature failure was always a problem. As was the carpet catching fire inside the passenger compartment. This is all due to the Wankel engines inherently low efficiency... most of the horsepower potential contained in the fuel is wasted out the exhaust system.
    1
  2483. @Abdul Muqsit Tofie Combustion efficiency is just one of many fatal flaws in the Wankel engine concept... Wankel engines no longer offer any advantages or further development potential.
    1
  2484. @Sofa Kingdom All of the legitimate engine manufacturers in the world have abandoned further development of the Wankel engine... it is now the sole domain of crackpots like Gilo Cardozo and David Garsides or criminals and con-men like Paul Moller and Ernie Brink.
    1
  2485. @madjimms It is very apparent that you do not have a firm grasp or working understanding of the fundamental and inherent flaws that plagued the Wankel engine design right up until it became obsolete in 2012... The best engineers and engine manufacturers in the world concluded long ago that the Wankel engine had reached the limits of its design evolution and no longer held any further development potential... even Mazda abandoned development of production Wankel engines in May 2009... more than a decade ago.
    1
  2486. @Sofa Kingdom I personally love Rotary engines and have 3 in my collection... but of course we are talking about WANKEL engines here son, apparently you don't know the difference yet...
    1
  2487. @Sofa Kingdom The truth is incontrovertible son... people need to hear the facts and the false rumors you try to propagate need to be exposed for what they are, these crackpots are nothing but fakes and frauds.
    1
  2488. @Sofa Kingdom You do not intimidate me in slightest son... If you think the Wankel can be developed into an efficient design you know absolutely nothing about engineering or the history of the Wankel engine's development.
    1
  2489. @MajorLeague Real amateur people, the professional engine builders understand that using 10:1 CR with high manifold pressures is a recipe for disaster. There are lots of home-gamers and shadetree mechanics out there building "grenade" engines in their driveways like you kid, but by simply bolting on aftermarket kit parts without any grasp of the engineering required to make big horsepower numbers reliably all you will achieve is poor performance and ticking timebombs.
    1
  2490. @MajorLeague That pile of junk was no race car son... It is very doubtful someone with your limited education and experience could be hired as professional automotive technician in any capacity... certainly not in professional Motorsports.
    1
  2491. @MajorLeague Wrong! The Wankel engine requires a much greater safety margin for ignition curve than reciprocating engines as its non-quench type chamber is more prone to erratic flame propagation and pre-ignition/detonation events.
    1
  2492. @MajorLeague WRONG AGAIN! retarding ignition timing reduces the chances of explosive or detonation events... which is why modern turbocharged engines utilize pre-programmed or active ignition boost retard systems. this is in addition to lowering the static compression ratio to 9.0:1 or less.
    1
  2493. @MajorLeague Converting naturally aspirated Wankel engines to turbocharged applications incurs several inherent disadvantages which include higher than ideal static compression ratios which are not easily changed but they also lack the ability to easily change or optimize induction and exhaust timing and duration and lack the ability to alter of adjust flow rate (lift) independently of valve(port) timing without significant modification of the ports and thus manage DCR to safe levels under boost transitions and manifold temperatures.
    1
  2494. @MajorLeague You stated in previous remarks on another video that Wankel engines were ideal for aircraft applications... a patently false statement that is easily debunked.
    1
  2495. @MajorLeague It is apparent from your benighted comments that you are ill-equipped to detect or identify the typical symptoms that are associated with the primary failure mode in Wankel engines (compression loss). Very doubtful... you don't sound like you are actually that experienced at all... after all there are few engine designs easier to repair than a VW type 1 engine, in fact it is possible to repair a compression loss failure without complete dis-assembly, a broken piston ring can be repaired with disassembling as less than half the engine... in fact without even removing the engine from the vehicle!
    1
  2496. @MajorLeague How would you know? No one would hire someone as incompetent and uneducated as you son... sounds like it tough for you to find a mop job.
    1
  2497. @MajorLeague Please stop pretending to an expert... its obvious you are nothing but an amateur fan at best... a complete novice.
    1
  2498. @MajorLeague Wankel engine do not have modern high efficiency Quench type combustion chambers... they are more susceptible to both detonation and detonation damage.
    1
  2499. @MajorLeague Curtiss Wright and NASA spent millions of dollars developing a certified general aviation engine but all efforts proved a total failure, there are no FAA or EASA certified Wankel engines.
    1
  2500. @MajorLeague You do not appear to be an expert on any aspect of Wankel engines or automotive engineering in general... any engineer or experienced automotive professional can see this from your nonsensical, amateur remarks that you are attempting to discuss a topic you know almost nothing about and certainly have no formal education on the topic.
    1
  2501. @MajorLeague Wrote, Quote; "1. Turbo applications can't benefit from quench in any significant way." Then please explain WHY? Why does ever single current turbocharged production engine and modern turbocharged racing engine uses a Quench chamber design???
    1
  2502. @MajorLeague Wrote,quote; "It (Quench chambers) can actually increase volatile combustion under boost." Then why can Quench chamber engines run higher manifold pressures and temperatures, higher advance curves and lower octane fuel than non-quench designs????
    1
  2503. @MajorLeague Wrote, quote; "Renesis has scalloped rotors" ALL WANKEL ENGINES HAVE A COMBUSTION CHAMBER DUMMY!
    1
  2504. @MajorLeague WHY? Would any engineer Increase the combustion surface area of an engine that already has TOO MUCH surface area conductivity and horrible thermodynamic entropy????
    1
  2505. @MajorLeague "depricated"??? You mean depreciated? or deprecated? You can do both as the non-quench, hemispherical engines are OBSOLETE in both production automobiles and MODERN Racing engines.
    1
  2506. @MajorLeague Like the Hemi engine the non-quench Wankel engine design is OBSOLETE due to its poor combustion efficiency and power output... in particular new production turbocharged applications that continue to grow in popularity as power-per-liter output, fuel efficiency and cleaner emissions continue to improve thanks to very efficient, detonation resistant quench chamber designs.
    1
  2507. @MajorLeague preignighters??? YOU MEAN LIKE CARBON DEPOSITS?????
    1
  2508. @Sofa Kingdom Just the facts here kid... I see you continue to be plagued by poor judgement and bad life choices but again some people like you feel the need to learn everything the hard way.
    1
  2509. That is a major factor in why they are obsolete now.
    1
  2510. Wow! its easy to see from your comment, you are not an engineer or a competent mechanic...
    1
  2511. You don't know anything about engines do you?
    1
  2512. If the piston does not push the exhaust gases out? Are you suggesting there is no pumping loss during the exhaust stroke???Then explain why does the cylinder pressure rise during the exhaust stroke after BDC??? A turbocharger's exhaust turbine is driven by the TEMPERATURE DIFFERENTIAL of the exhaust gasses Gas Turbines are Heat Engines and comply with Second Law of Thermodynamics and the Carnot Cycle Formula...
    1
  2513. Lol!!!! Only if your air intake is at sea level and your exhaust pipe is in outer space... Lol!!!
    1
  2514. What causes the pressure difference?
    1
  2515. Combustion draws the air in?????
    1
  2516. You wrote, quote; "so on a naturally aspirated engine, how is the air being drawn in? by pressure differential" What causes the pressure difference that draws the air into the engine and the cylinder(s)????
    1
  2517. Then explain why does the cylinder pressure INCREASE at the beginning of the exhaust stroke??? The pressure inside the cylinder is lowest after 90° ATDC and then increases after 180° BDC. What causes this increase in cylinder pressure????
    1
  2518. Are you not familiar with how cylinder pressure is measured son? How do you think you measure cylinder pressure???
    1
  2519. @ernie brink rotary hemi Hey Ernie! Please tell us WHY? your engine doesn't run????
    1
  2520. @ernie brink rotary hemi Just tell us WHY? your engine still doesn't run????
    1
  2521. Actually reciprocating engines can rev higher... the internal components also only rotate at 1/3 of crankshaft speed... so the high rpm is deceiving.
    1
  2522. Not true, 26 of the world's largest and best engine manufacturers and over 100 of the best universities and research institutes spent over a decade, millions of man hours and billions of dollars developing the Wankel engine design. Mercedes-Benz and and General Motors for example both spent over 100 million dollars a year on Wankel research and development. Ford Toyota Porsche Rolls-Royce Nissan Alfa Romeo American Motors (AMC) Citroën Suzuki Yamaha Kawasaki BSA Norton Hercules John Deere Ingersoll and Rand Fichtel & Sachs AG Yanmar Diesel Co. Ltd Daimler-Benz AG Deutz AG. MAN AG KRUPP AG IFA VEB Graupner Savkel All the motorcycle and automotive manufactures already mentioned above plus the heavy truck and Diesel engine manufacturers and the aircraft engine manufacturer Curtiss-Wright OMC marine engine manufacturer. and of course Wankel-NSU which became Audi.. and dozen of subsidiary companies and and partnership companies which combine represent billions of dollars in research and development besides just tiny little Mazda.
    1
  2523. It is kind of sad to think that people alive today have either already forgotten or is completely ignorant about why the Wankel engine could never be competitive or commercially viable alternative to reciprocating engine technology and why the Wankel became obsolete.
    1
  2524. I love Wankel engines (I own a historic one myself), but I stick to the facts not bullshit wishful thinking. You have your facts wrong again sir, Mazda announced it would retired the uncompetitive 787b in 1990.. before the fluke win at Sarthe in 1991 and had already signed a deal to run the Judd powered Jaguar chassis for the 92 season, the Wankel engine was never banned by the FIA.. it simply changed the displacement and fuel consumption classification requirements. Although this myth is popular there is no evidence to support it... its all pure fantasy. The 787b was a slow uncompetitive car that lost every WSC series race event except one, 20 losses in 21 races with ZERO POLES and ZERO FASTEST LAPS its massive, lazy R26B engine was the largest displacement engine allowed and used the most fuel, (Mazda required FIA exemptions for non-compliant displacement, fuel consumption, fuel capacity and vehicle weight(wet).
    1
  2525. Wankel engine had notoriously bad reputation for poor reliability and short service life until they became obsolete in 2012. Porsche has won Le Mans 19 TIMES without the need for any special exemptions or cheating of the rules. Even the Diesel engine has proven far superior in racing than the troublesome Wankel, a Diesel powered car has won LE MANS 10 TIMES!!!!
    1
  2526. @Chicken Leg Not really, most people think they sound just awful and they are notoriusly very weak engines that produce very little power for their displacement (true displacement) and the amount of fuel they guzzle.
    1
  2527. @Chicken Leg But reciprocating engines rev higher...
    1
  2528. Yeah, But what is the Range???
    1
  2529. A garden shed goes really quickly too if you push it off a cliff... but its range is limited by the height you dropped it from.
    1
  2530. Why? Diesel fuel is low octane.
    1
  2531. +Ellenor Malik Sorry, but that won't fix the problem either. Unfortunately the Wankel KKM design is not very efficient or compatible with Stratified Charge Mode combustion... which is also why you will not see any production Wankel engines using the Diesel Cycle or GDI.
    1
  2532. +Ellenor Malik Yes! Oh Please do! but promise you will post a video... it should be good for a laugh!
    1
  2533. Eccentric-crankshafts are a type of crankshaft like any other... some people that are not very smart like to use slang terminology it seems.
    1
  2534. Trump already announced the end of subsidizes for electric cars... Macron is corrupt.
    1
  2535. France is now occupied by the globalist Enviro-Nazis
    1
  2536. @Big Teddy The hoax of global warming isn't effective unless you cultivate a completely irrational phobia of fossil fuels...
    1
  2537. Well that is why reciprocating and turbine engine dominate the transport industry and wankel engines died out
    1
  2538. "When the battery technology barrier is finally broken" What are you talking about? You are not a chemist or an engineer are you?
    1
  2539. Contrary to a lot of quasi-religious/political/stock market hype recently.. electric vehicles using rechargeable batteries will not replace ICE powered vehicles.... BEVs will remain as they always have, as a niche market segment.
    1
  2540. Not very well it seems... your performance is not very believable.
    1
  2541. Apparently they redacted part of your script, the part where you say, "Rechargeable batteries will NEVER! (dramatic pause) be able to match liquid hydrocarbon fuels in Specific Density".
    1
  2542. Not at all, I was simply shocked by your frankly bizarre comments regarding battery technology and EVs... I sincerely inquired as to your technical expertise on this topic and to clarify if your statements were merely pretense. I assumed by your response that you were being extremely sarcastic in regards to being employed as an actor, my response was equally in jest if so. Are you really an actor? or where you merely attempting to save face or deflect my inquiry to validate your remarks. Cheers
    1
  2543. Mazda announced it will be selling 4-cylinder Skyactiv-X engines in the new Mazda3.
    1
  2544. The Skyavtiv-X 4-cylinder IS REAL... not another one of your fake rumors that never comes true! https://www.youtube.com/watch?v=87c48vd9Bvk
    1
  2545. The Skyavtiv-X 4-cylinder IS REAL... not another one of your fake rumors that never comes true! WATCH IT HERE... ITS A REAL ENGINE NO FALSE RUMORS! N https://www.youtube.com/watch?v=j5P_sACVuxQ
    1
  2546. MAZDA Unveils New 4-cylinder Skyactiv-X engine at Tokyo Motor Show. https://insidemazda.mazdausa.com/newsroom/2017-tokyo-motor-show/
    1
  2547. Oh poor jonny... are you still getting duped by fake vaporware scams????
    1
  2548. Take a trip down to your local Mazda dealer... no one makes Wankel engines anymore!
    1
  2549. That's right jonny... Mazda only uses Skyactiv technology for reciprocating engines... Wankel engines are OBSOLETE!
    1
  2550. The overheat exhaust light is for people that continue to drive their car long after the engine has lost significant compression due to apex seal damage... and pumping out large volumes of partially and still burning fuel and air into the exhaust causing the floor pan and carpet to catch fire.
    1
  2551. The Wankel engine was found to be inferior to reciprocating engines and is now an obsolete design
    1
  2552. Indeed, the RX-8 turned out to be an embarrassing failure that cost Mazda nearly $3 billion dollars in lost development and production costs.
    1
  2553. Diesel engines are Stratified Charge Mode combustion, not homogeneous Charge Mode.
    1
  2554. The Wankel is an obsolete design... there is no longer any legitimate research or development on this type of engine... it is now the sole domain of crackpots and scam artist.
    1
  2555. mexicans don't like cold climates.
    1
  2556. Rest in peace Wankel engine... 1964 - 2012
    1
  2557. All Wankel engines use the 4-stroke operating principle.
    1
  2558. Pretty rare to see them working anymore... they have been obsolete for a number of years now.
    1
  2559. Mazda no longer makes Wankel engines. They are plagued with higher exhaust pollution because they are simply less efficient. That might be true... if the Wankel was not also notoriously unreliable and consistently had shorter service life in non-emissions compliant applications too. The Wankel engine has never been very successful in competition either... it is no longer used in any world class or major professional Motorsports series.
    1
  2560. The major flaw in the Wankel engines that is directly related to its poor reliability is its inherently poor geometry... the design and shape of its seals, and the limitations of the apex seals is responsible for the Wankel's primary mode of failure... loss of compression due to apex seal damage...
    1
  2561. Don't forget that Porsche has won the Le Mans 24 hours 19 times with reciprocating engines... Audi has won 9 times with a DIESEL engine... the fact is there is no better engine for racing better than reciprocating engines and that Audi conclusively proved that the reliability, incredible torque output and efficiency of Diesel engines are superior to Wankel engines on the track.
    1
  2562. "Ignorance is bliss" As they say... at 130,000 km your engine is probably well on its way out... damaged seals, low compression and lost power... But I'll wager you cannot afford anything better and will drive until it floods every time you start it up.
    1
  2563. The Wankel engine has been obsolete from manufacturing for several years... Mazda has completely discontinued them and says it has no plans to bring the engine back. With the RX-9??? That is interesting because there is no RX-9... it does not exist, no such car ever did.
    1
  2564. Check out some V-8 engines, 335mph capable in 3.65 seconds and you still talk about power? You obviously don't know what real power is kid!!!!
    1
  2565. You don't know what you are talking about son... you don't seem to know much of anything about engines... especially Wankel engines. Wankel engines have been obsolete for several years because they are inferior to reciprocating engines... you need to learn to accept the facts and get yourself better educated... you sound very amateur and naive when you use slang and street patois.
    1
  2566. The only thing that is not changing is the fact that Wankel engines are completely and totally obsolete in the engine and automobile manufacturing industry... not even Mazda makes them anymore... because people refused to buy them.
    1
  2567. The are custom shops around the world that specialize in all sorts of obsolete and antique engines... you can buy a new Flat-head Ford Model T engine or a brand new WW1 fighter plane engine... of course this does not change the fact that engines like the Wankel are OBSOLETE.
    1
  2568. Yes, with enough money you can buy any obsolete engine... including the obsolete Wankel.. of course that does not change the fact that it is outdated, obsolete, dead-end technology that is no longer mass produced anywhere in the world... not even Mazda makes these shitty engines anymore.
    1
  2569. @Mandernach Luca Unlike the obsolete Wankel engine, Jet engines are still mass produced and completely dominate the commercial and military aviation industry. Although no longer constructed in Germany, the BMW -003 family is still in production (the longest continuously produced jet engine in history) Cheers!
    1
  2570. Cars with dead engines usually sell very cheap.
    1
  2571. The Wankel engine was plagued with several fatal flaws... the last manufacturer abandoned these engines due to reliability and fuel economy problems.
    1
  2572. my condolences
    1
  2573. Exact same car just sold for 1,000 pounds
    1
  2574. Graupner GmbH. no longer makes these engines... they were discontinued years ago.
    1
  2575. The Wankel does not have a good combustion chamber design... terrible combustion efficiency and no market demand is the result.
    1
  2576. No, Wankel engines are obsolete now and although introduced into some yard equipment products years ago they were a commercial failure.
    1
  2577. Windfarms are just dumb...
    1
  2578. They made Wankel chainsaws in the 1970's... they sucked.
    1
  2579. But what about Specific Density? No one is talking about this problem. Will Graphene actually significantly improve specific density or is this just one more "in the future" cop out excuses?
    1
  2580. I think you need to go look at some video on engine fundamentals first and then perhaps find some good information on nitrous oxide too.
    1
  2581. Funny because full sized reciprocating engine can rev even higher... so do 2-stroke RC engines... but what do you know kid?
    1
  2582. Rust in Peace Wankel engine 1964 - 2012
    1
  2583. WANKEL engine... Graupner GmbH. never made Rotary engines.
    1
  2584. Honda still makes VTEC... Mazda dropped RX like a bad habit years ago!
    1
  2585. Motor and engine are synonymous... Rotor and Piston however are not.
    1
  2586. Its not efficient at all... which is why this type of engine is obsolete.
    1
  2587. Good question.. Elon Musk is a crook!
    1
  2588. Why are there so many crackpots and engine technology scams in Australia? Are Australians really that gullible?
    1
  2589. +Kiyarose3999 Do you work for EngineAir, paid by Di Pietro or any of his affiliates for endorsements? Are you related to the Di Pietro family or any affiliate?
    1
  2590. +Kiyarose3999 Angelo Di Pietro has publicly made several completely false and unsubstantiated claims regarding the efficiency of his engine design which are on its face not credible or possible to achieve.
    1
  2591. Oh! I see... so you are the crazy crackpot, that hates internal combustion engines and believes in crazy conspiracy theories about the petroleum industry and global warming. Well, good luck with all that quasi-religious environmentalist cult crazy talk.
    1
  2592. So please stop wasting people's time with wacko crackpot scams like compressed air cars!
    1
  2593. Yes I agree, you are just an environmentalist that understands nothing about engineering or the automotive industry. Perhaps you should try religion instead, because Engineering is not a "faith based" endeavor.
    1
  2594. Spare me the "Oil Company" conspiracy rhetoric... it just makes you look unhinged.
    1
  2595. My condolences... but someone has to do the mindless manual labor
    1
  2596. No legitimate, experienced engineer worth his salt would be supporting such as scam... that's why I asked if you were being paid to promote it.
    1
  2597. You don't have a point, remember? You don't have the slightest clue what you are talking about...
    1
  2598. As I said, engineering (and climatology) is not a faith based endeavor... please spare us you religious beliefs and your psycho doomsday babble.
    1
  2599. @Hampus Rosenberg Because Wankel engine is the correct term.... especially considering now that the trademarked Mazda Rotary® brand name is defunct.
    1
  2600. This isn't a Rotary engine... it is a WANKEL engine.
    1
  2601. The Wankel is dead... Rest in peace 1964 - 2012
    1
  2602. Sadly, the last legitimate manufacture (Mazda) voted to discontinue them 10 years ago... all production ended 7 years ago.
    1
  2603. Indeed it does, the Wankel engine is now obsolete in the engine manufacturing industry and is no longer manufactured in serial mass production anywhere in the world today... All 26 of the original Wankel licensee's and their subsidiaries including Mazda have abandoned the Wankel engine.
    1
  2604. Don't believe me??? Try stopping by your local Mazda dealer and ask to see the new 2019 RX models.
    1
  2605. +spirit Rx7 You Don't
    1
  2606. They still haven't... less than 1% of all the cars in the world are electric... don't expect these figure to change much either.
    1
  2607. Someone like you said that 100 years ago... they were just as wrong then as you are today...
    1
  2608. Toyota sells more Camry models in one month than Tesla produces in an entire YEAR... and as the only major company committed to producing only electric vehicles... its yet to make a profit from selling cars.
    1
  2609. Countries like the UK, France and Spain have created massive pollution problems because they have the worst air pollution standards of EU countries... Compared to the United States, Germany and Japan? These countries are DECADES BEHIND in vehicle emissions standards.
    1
  2610. But the fact still remains that battery technology will never match the energy storage capacity or recharge rates of liquid fuel or gaseous fueled vehicles and will always cost significantly more because of the greater dependence on expensive rare materials, energy input, production costs and low production volumes.
    1
  2611. Internal combustion cars DO NOT require petroleum based fuels, today there are millions of vehicles that run of alternative fuels... EVs have been around for more than 130 year and will still be around in very limited specialized applications where range, refueling time and cost are not a major factor, they will never be able to replace liquid or gaseous fueled vehicles.
    1
  2612. The number of bio-fuel refueling stations, CNG/methane and hydrogen fueling stations is also growing rapidly... vehicles that use these fuels can be recharged and back in service in just minutes and cost less to purchase.
    1
  2613. Japanese automaker Mazda just announced it is committed to producing internal combustion cars to 2050 and beyond... it will only offer EVs in markets that mandate zero emission vehicles under the new law that force manufacturer to offer a zero emission vehicles.
    1
  2614. I thought the the term "Global Warming" has been replaced with the less misleading and less controversial term "Climate Change"??? Are you implying that EVs do not contribute to global carbon emissions and have no carbon footprint? Internal combustion cars DO NOT REQUIRE Petroleum... they will be around long after petroleum runs out... millions of vehicles already use renewable alternative fuels and this market continues to expand and grow.
    1
  2615. HFC vehicles are considered zero emission because they have no harmful tailpipe emissions... but 96% of all commercially available hydrogen is still produced from petroleum and generates CO2 emissions.
    1
  2616. +Derek Hilliker Not true, the Wankel design is inherently less reliable due to its poor combustion characteristics and weak, rather fragile sealing system... even Mazda would not offer the same warranty on their RX models, they knew full well that these engines are notoriously unreliable.
    1
  2617. Precious few people were lucky, the rest never bought another Mazda with a Wankel engine ever again... sales slowly declined and then dried up completely by 2012 forcing Mazda to permanently discontinue the troublesome and unpopular engines.
    1
  2618. Not for some drivers, depending on the region 200 mile range is still unacceptable and well below industry standards... especially considering how long it takes to recharge again.
    1
  2619. Indeed, EVs are still a tiny niche market... less than 1% of all vehicles, most car buyers still opt for the superior performance and value for money the ICE car offers, it continues to dominate the industry.
    1
  2620. Not anymore...
    1
  2621. +Hachi-Roku Performance Group I'm still here, but the RX brand is not
    1
  2622. Hachi-Roku Performance Group The people at Ford sold Mazda because there engines suck...
    1
  2623. Hachi-Roku Performance Group Maybe if Mazda sold more cars than Ford that would be meaningful... but its not.
    1
  2624. +Hachi-Roku Performance Group Well, people stopped buying Mazda RXs... Mazda had to discontinue them or face bankruptcy.
    1
  2625. +Hachi-Roku Performance Group Mazda was the only company selling cars with Wankel engines until sales dried up and production was cancelled in 2012.
    1
  2626. +Chad Bremer If that were true? I would be posting on every Wankel engine video before you.... but you beat me every time.
    1
  2627. +Flyingdutchy33 Rotary car...? You mean WANKEL powered car?
    1
  2628. You failed to mention that this guy is nothing but an amateur blogger... not an automotive engineering expert.
    1
  2629. Its seems evident from the video that buying a RX-8 is a very bad investment.
    1
  2630. Shops are not laboratories, but they will build anything the customer wants if he has cash to pay for it... this poor sod clearly has more money than brains.
    1
  2631. A mediocre and lackluster car that needs a new engine... a new engine that costs more than the car is worth.
    1
  2632. Discontinued because the RX-8 was unpopular
    1
  2633. Maybe if you think the Pontiac Aztek was great looking too...
    1
  2634. These cars are nearly worthless on the resale market because no one wants them...
    1
  2635. I am Reality, place you fear and seldom tread...
    1
  2636. Jonny you need to stop hiding in you little fake, fantasy world where wankel engines are still relevant, here in the real world they are dead.
    1
  2637. +sproly born The reciprocating engines manufactured by the Austrian firm ROTAX is world's leading supplier of aircraft engines for ultra-light and lightweight aircraft. http://www.rotaxdisk.com/rotax-aircraft-engines-revolutionizing.html
    1
  2638. +sproly born "Rotax is the largest producer of gasoline aircraft engines in the world." https://www.flyrotax.com/about-us/rotax-aircaft-engines.html
    1
  2639. +Anonym Wankel KKM engine design suffers from some very serious flaws due to the limitations of the restricted geometry envelope that allows it to work in the first place.. in short, its basic shape makes it terribly inefficient and its shape cannot be altered otherwise it simply no longer functions at all.
    1
  2640. That's right, although the Millet Type Rotary engine was popular in aircraft and motorcycles prior to WW2... The WANKEL engine however was never used in aircraft production...
    1
  2641. @david husband Mazda lost the 1991 WSC championship to JAGUAR! No it didn't.. the points leaders that season crashed early in the race... Mazda only needed a car to finish for the win... it was pure dumb luck.
    1
  2642. @david husband Yes, the Mazda 787B performed very poorly... 20 losses in 21 races with ZERO POLES and ZERO FASTEST LAPS... it finished the 91 race significantly slower than previous ETs.
    1
  2643. @CaberFeidh Indeed... only amateurs refer to a Wankel KKM engine as a "Rotary"... just like these people think Felix Wankel actually designed it... which is not true either.
    1
  2644. pretty close...
    1
  2645. We are heading into the next ice age, so more CO2 is a good thing!
    1
  2646. Unfortunately the problems with the Wankel design are because of some serious fundamental flaws that are inherent to the same basic geometry that made it possible in the first place... the simple truth is the reciprocating type engine just offer way more advantages without all the downsides.
    1
  2647. The biggest fatal flaw that makes the Wankel no longer able to compete is it lacks any potential for using a high efficiency quench type combustion chamber design like all modern engines do.
    1
  2648. 500,000 km with a Wankel engine without a significant loss of compression and major problems would be an unbelievable feat... your chances of winning the lottery are better.
    1
  2649. Dr Hanns Paschke and Walter Froede called it an Exzentrischekurbelwelle which translates into English as "eccentric crankshaft".
    1
  2650. The actual, total displacement of the Renesis engine is 3,924cc's... Mazda used the "tax displacement method' until they discontinued production in 2012.
    1
  2651. Wikipedia? Lol! That hardly qualifies as a technical reference source... its very simple if you are educated in the fundamental operation of the internal combustion engine... each orbiting piston(rotor) has 3 sides forming 3 combustion chamber volumes, each with a swept volume of 654cc. times the 2 housings is 6 and equaling 3,924cc. The other important thing that people without formal engineering experience fail to understand is that a 4 cycle Otto or Diesel engine completes its firing sequence in 720° of crankshaft rotation while the 4-cycle Wankel KKM designs required 1080° of rotation to complete its firing sequence... These two important and often misunderstood details are the basis of the commonly used "2X" conversion formula for accurately "comparing" the displacement of the Wankel with other designs.. Any questions? I would be happy to explain in more detail...
    1
  2652. Modern reciprocating engines are vastly superior... even Mazda now only makes reciprocating engines.
    1
  2653. @ArtistAnthony9 You mean Wankel engine right? Mazda never made Rotary type engines ( Mazda only sold Wankel engines under the "Mazda Rotary®" trademarked brand name from 1974 until they became obsolete in 2012.)
    1
  2654. @ArtistAnthony9 Simplistic??? Well, it sounds like you have never taken one apart before... This engine is more complex than a comparable 2-cycle engine and the Mazda Renesis engine for example had over 235 moving and seal related parts per engine.
    1
  2655. @ArtistAnthony9 Never going to happen... every single legitimate engine manufacturer in the world including Mazda has abandoned the Wankel engine design... it is now classified as an obsolete engine technology.
    1
  2656. @ArtistAnthony9 But the Graupner GmbH. model 49 PI in the video is not a Rotary engine or a Wankel Rotary... its a KKM-57 Wankel engine, the non-rotary version, the one not designed by Felix Wankel. Do you not understand the difference???
    1
  2657. @ArtistAnthony9 Agreed, I also enjoy collecting and restoring old, antique and obsolete engines like Wankel engines... I also collect pre-WW2 Rotary engines as well.
    1
  2658. Bullshit Johnny... HCCI technology was invented by Mercedes-Benz... and only works on reciprocating engines.
    1
  2659. Wrong! complete combustion requires a "Quench" type combustion chamber... something that is absolutely impossible with a Wankel engine.
    1
  2660. Hey Johnny! Why don't you go down to the local Mazda dealer and see for yourself.... They don't make Wankel engines anymore!!!
    1
  2661. WRONG! DUMMY Mazda only developed Skyactiv-X technology for RECIPROCATING ENGINES!!!! https://www2.mazda.com/en/next-generation/technology/
    1
  2662. Sorry Johnny but Mazda abandoned development of hydrogen fuel engines back in 2009.
    1
  2663. As the disappointing failure of the Mazda RX-8 Hydrogen-RE proved... using hydrogen causes a 50% DROP in efficiency in Wankel engines and was the least efficient hydrogen fuel vehicle tested by the HyNor program.
    1
  2664. NO ONE MAKES WANKEL ENGINES ANYMORE... NOT EVEN MAZDA!!!
    1
  2665. Hydrogen vehicles do exist and are sold but none use the obsolete Wankel engine... Wankel engines are too inefficient to use expensive hydrogen as they cannot support the high static compression ratios needed for efficient combustion of hydrogen fuel.
    1
  2666. Just the facts here Johnny, Wankel engines are obsolete here in the real world... they only exist now in your imagination that is filled with make-believe stories and false rumors.
    1
  2667. No manufacturers use this engine anymore... it is an obsolete design in the engine manufacturing industry.
    1
  2668. Sure it will, its small enough to replace a Honda windshield wiper motor... sadly though it lacks the torque needed to run the wipers!!!
    1
  2669. Then why are they no longer used in any major professional or world class racing series???
    1
  2670. Then why are the fastest and most successful race cars in the world all use reciprocating engines????
    1
  2671. Mazda is nothing special... low end, disposable cars for people that cannot afford anything better.
    1
  2672. Indeed, the internals are only moving at 1/3 crankshaft speed, Wankel engines are obsolete now, no one manufacturers them anymore... not even Mazda.
    1
  2673. @Amadeo Bon Wankel engines are obsolete now, as an aircraft engine they were a failure.
    1
  2674. @100GTAGUY That is why there are no FAA or EASA certified flight-worthy Wankel engines available. The Wankel engine has always been poorly suited to aircraft applications which they have never been used by any manufacturer for certified production aircraft. Only Graupner GmbH. made RC Wankel engines... and they discontinued them ages ago...
    1
  2675. @100GTAGUY Gas turbines offer a Order of Magnitude greater power-to-weight ratio, Power density and time between overhaul performance with greater range and fuel efficiency than any Wankel engine known to ever exist. Cheers!
    1
  2676. Good comment!
    1
  2677. roof top solar is a scam...
    1
  2678. @Troy Bush Who said the Wankel's fatal flaws have anything to do with a lack of material technology or a lack of computing power??? Your theory is like suggesting that technology can make a square wheel more efficient than a round wheel... it indicates a complete lack of understanding of the inherent fundamental flaws in the Wankel KKM design or why it is now obsolete. Please explain why you would want a gasoline fuel that acts like Diesel fuel??? and how that would solve the flaws in the Wankel engine?
    1
  2679. Clearly you do not have a functional understanding of the Wankel KKM engine's fatal flaws and why development of this engine design has been abandoned and is obsolete today.
    1
  2680. Please explain what new material shows promises in offering a significant improvement in Wankel engine performance and efficiency and how is this new material(s) is utilized to achieve this improved performance????
    1
  2681. Just answer the simple question... "Please explain why you would want a gasoline fuel that acts like Diesel fuel??? and how that would solve the flaws in the Wankel engine?"
    1
  2682. Its pretty self-evident that you sir are nothing but a fake and a fraud.
    1
  2683. Its pretty self-evident that you sir are nothing but a fake and a fraud.
    1
  2684. Thank you proving my point! You sir are a fake.
    1
  2685. Yes. Thank you again for confirming you have no clue what you are talking about and are in fact just wildly speculating about a topic you simply do not have the slightest grasp of... You cannot change the unique geometric relationship that allows the Wankel KKM to function as a 4-stroke engine... the shape of the combustion chamber and its volume is fixed within a very narrow range... increasing the static compression ratio can only be achieved by reducing the volume of the chamber recess and this reduction directly and adversely effects ignition, flame propagation and overall combustion efficiency. This also clearly explains why there has never been any successful examples of Wankel engines utilizing the Diesel Cycle. Please stop pretending you understand this problem or how its supposedly can be cured by modern materials or computers... you are simply embarrassing yourself with your ridiculous remarks and childish theories... the only one that looks like a fool here is you son.
    1
  2686. Yeah, you look really stupid now so you should go and spare yourself any further embarrassment. Why don't you go post a comment about something you actually understand? Because engineering is obviously not your subject son.
    1
  2687. @.SpiinDeX You can't escape the truth... and lies will always be exposed
    1
  2688. Yes, an evil tyrant...
    1
  2689. vaporware scam
    1
  2690. Another famous white elephant project.
    1
  2691. You either didn't own it very long or your memory is very bad....
    1
  2692. "Your results may vary" Sales of the Mazda RX brand was already in decline by 1986 due to problems with fuel economy, reliability and lack of performance, sales continued to steadily decline until 2012 when sales completely hit rock bottom.
    1
  2693. 7 was the model... there were several models produced in the RX brand line... eg; RX-3, RX-7 RX-8 etc.
    1
  2694. In 1987 RX-7 only had around 150hp (new) only the Turbo model had 200 hp but these engines were very unreliable.
    1
  2695. Starting issues and flooding are very common symptoms of low compression due to seal failure and damage.
    1
  2696. Lean burning engine produces MORE NOx
    1
  2697. +namasayanif Clearly you don't understand the basics of NOx formation...
    1
  2698. You seem completely oblivious to the effects of PRESSURE on NOx formation.
    1
  2699. No, high pressure is only inherent to engines with high static CRs above 14:1... LIKE THE SKYACTIV-X with 16:1 CR.
    1
  2700. Diesel engines operate at far leaner AFRs (up to 80:1) they also produce high levels of NOx due to the high pressures above 14:1 and the EXCESS OXYGEN available to form NOx compounds.
    1
  2701. No, this type of engine will not run on hydrogen, although Mazda and some other manufacturers have developed hydrogen fueled Wankel designs, testing showed they performed very poorly.
    1
  2702. Perhaps you should see a doctor... it could be a brain tumor!
    1
  2703. You are nothing but a fake and fraud... go troll somewhere else.
    1
  2704. You don't intimidate me kid... but I do feel sorry for you... you and your whole misguided generation.
    1
  2705. Your'e not a very good liar kid!
    1
  2706. You are a a fake and a fraud kid, you don't fool me.
    1
  2707. You got nothing kid... you are a joke!
    1
  2708. You are a FAKE kid... get over it!
    1
  2709. Yes, I fully understand that you are a fake and a liar... you are not fooling me son.
    1
  2710. Not enough torque
    1
  2711. The Miles M52 would never take-off under its own power because the Whittle W.B.2/700 engine was a total fiasco... it did not produce the specified thrust required to go supersonic and never successfully completed a full power test without damage... Whittle abandoned the project when he was removed from his own company Power Jets ltd. and exiled to drug rehab in the US, the uncompleted W.B.2/700 was canceled. The UK government had no choice but to cancel the now embarrassing, over-budget and behind schedule debacle that is now remembered as the M.52 fiasco, a plane that never was.
    1
  2712. incredibly inefficient!
    1
  2713. +EvenStar LoveAnanda NO STROKES??? Every Mazda 13B engine ever made has a 30mm STROKE check the engine specs if you don't believe me
    1
  2714. +EvenStar LoveAnanda Having ports or valves makes no difference, there are 2-strokes with poppet valves and there are 4-strokes with only ports.
    1
  2715. +EvenStar LoveAnanda Its a WANKEL KKM and it requires 3 revolutions of the SHAFT to complete all 4-strokes in each chamber.
    1
  2716. +EvenStar LoveAnanda Same thing, an eccentric-crankshaft is still a type of crankshaft. The piston in the Wankel orbits in a planetary motion instead of reciprocating in a single plane, its axis reciprocates side-to-side instead of up and down,
    1
  2717. Rolls-Royce never got the design to work properly, they had serious problems with cold starting and apex seal failures, they weren't the only failed attempt to build a Diesel Wankel either, John Deere, Yanmar, Deutz, MAN, Daimler-Benz and General Motors all attempted (unsucessfully) to build one too.
    1
  2718. Actually the Wankel is obsolete now, it could no longer compete with the other superior engines type still in production today.
    1
  2719. The is no RX-9... it was an internet hoax
    1
  2720. Aluminum body panels are stiffer than steel and more resistant to dents.
    1
  2721. Graupner GmbH. rated this 49PI RC model engine at 1 horsepower when new.
    1
  2722. Graupner discontinued the years ago, OS recently went bankrupt
    1
  2723. Millions of dollars and decades of research concluded that the Wankel was thermodynamically and mechanically inferior to reciprocating engines and offers no further development potential... this is why all of the original 26 Wankel KKM licensee's have abandoned development of Wankel engines... including Mazda. The Wankel's fundamental geometry is plagued by several inherent flaws that limits its efficiency and reliability... such as the fact that the Wankel cannot be adapted to use a modern 'Quench' combustion chamber, as a result the Wankel has terrible combustion efficiency compared to modern Pent-Roof and Wedge engine designs that benefit from "quench type" chambers.
    1
  2724. @xke xke Why do you and Erinie Brink post the exact same comments in my inbox??? You and Ernie must be the same person....
    1
  2725. I wouldn't call a 53% failure rate under the warranty period "reasonably reliable"
    1
  2726. Bathhurst? It sounds like one of those rallye races on temporary street circuits in new zeeland, is that the same thing I'm thinking of?
    1
  2727. Australian engineers? Like automotive engineers??? Australia doesn't make cars. I thought they imported all their cars from Korea or China now???
    1
  2728. But it seems not good enough to make cars...
    1
  2729. Logic of governments: Lets hired a drug addicted, alcoholic war hero to develop the supersonic engine and when its discovered that the engine is a total failure, cancel the program, cover-up the whole embarrassing fiasco and exile Whittle to drug rehab in the United States and tell him to never show his face in the UK again.
    1
  2730. @Dubsy You are not familiar with the Power Jets W.2/700 and W.2/800 engines designed by Frank Whittle??? Frank Whittle promised that a single example of this engine would propel the Miles M.52 to supersonic velocities.. but two of them installed in a Gloster "meatbox" only managed to boost its top speed 40 MPH!!!! Frank Whittle was accused of embezzling funds from the Miles M.52 program, lying about the W.2/700's performance, was facing criminal charges of assault and battery and was unfit to continue work. He was forcefully removed from his own company, the Miles M.52 and W.2/700 programs were cancelled and Frank Whittle was exiled to a drug rehab facility in the United States to cover-up the scandal.
    1
  2731. The Wankel was a deeply flawed and notoriously troublesome design, Mazda permanently discontinued them in 2012. As Mazda was the very last manufacturer left in the world the Wankel is now obsolete.
    1
  2732. All Wankel engines use the 4-stroke operating principle, not very successful in racing either unfortunately
    1
  2733. Wankel engines are dead... they have been obsolete for years.
    1
  2734. The 13b Renesis actually displaces 3.9 liters
    1
  2735. Actually one man single handedly killed-off the electric car in 1915... his name was Charles Kettering and he invented the electric starter for internal combustion cars.
    1
  2736. My sincerest condolences... perhaps someday you can afford a proper sports car.
    1
  2737. Ernie Brinks wankel doesn't work...
    1
  2738. +Darian Murcott-Istead Pre-mixing is monumentally DUMB... its nothing but a false urban myth.
    1
  2739. Ernie Brink, Why does your engine not run????
    1
  2740. Sounds more like a weedwacker than a 767b.
    1
  2741. Several companies marketed Wankel powered yard equipment but they were all commercial failures.
    1
  2742. Car companies only make cars that actually sell...
    1
  2743. @SidewaysGts Mazda discontinued the RX brand... because no one bought them anymore.
    1
  2744. @SidewaysGts 100 Million new cars sold last year... NONE of them had a Wankel engine.
    1
  2745. But Johnny, SPARCS was a colossal financial and technical failure... Garsides was fired from Norton, they went bankrupt foolishly investing in his incompetent engineering skills.
    1
  2746. Insert homosexual rotard comments below.
    1
  2747. Its already supercharged.
    1
  2748. The Mazda RX-7 is a better example of how they Don't work Lol!
    1
  2749. Mazda rebuilt more than 5,000 Renesis engines PER YEAR not counting brand new engines, rebuilds from outside contractors and all the engines rebuilt by the aftermarket that were out of warranty.
    1
  2750. Good question, increasing width of the seal actually reduces the ability to form a gas tight seal, increasing surface area reduces the pressure against the housing surface. The other problem is weight, a heavy seal causes chatter (called devil's nail scratches) and leaves damaging marks on the surface of the housing. The apex seal must be allowed to move in and out a large enough tolerance to conform to the considerable expansion, contraction and torsional movement but must be light enough that the minimum about of spring tension is used... heavier seal? More bounce... Strong springs more wear.
    1
  2751. The diameter of the housing is a serious limiting factor in the Wankel design.. as the radius increases so does the surface speed the seal must travel across the surface at the same rpm... The largest diameter Wankel ever built was 41 liters by Ingersoll-Rand and had a Radius of 424.18 mm ( 16.7" inches) but was limited to rotor/piston speeds of just 400 rpm.
    1
  2752. The other problem that faces all internal combustion engines the Conflageration Velocity or "Flame Speed" in a gasoline piston engine this is an issue when Bore diameter reaches 100 mm or 4 inches... as you increase the bore diameter beyond this the engine operating rpm is reduced because there simply is not enough combustion dwell (time) for the air fuel mixture to ignite and burn completely. In the Wankel this effects both the width and the diameter of the housing and limiting the practical size.
    1
  2753. 2 horsepower max. Torque? Too low to measure with existing technology. Lol!!!
    1
  2754. Yeah, actually for their size they produce less horsepower because of the lower efficiency... they tend to wear-out quickly and produce even less power. Cheers!
    1
  2755. Mazda announced last week it is taking orders now for delivery in Europe starting in September prices start at $23,000 USD
    1
  2756. No, because Diesel is very low octane
    1
  2757. Mazda is a joke...
    1
  2758. Sorry you can't afford a better car....
    1
  2759. Diesel fuel is not sold by Octane Rating... but it still has a measurable octane rating usually around 15 to 40 RON.
    1
  2760. Wtf does Diesel have to do with Skyactiv-X??? At least I can afford one...
    1
  2761. Diesel engines run using only STRATIFIED CHARGE COMPRESSION IGNITION... it will ignite and burn almost anything flammable... regardless of octane rating
    1
  2762. The kind that hold there resale value... Engines that use Homogeneous Charge Spark Ignition have a minimum fuel octane rating requirement BECAUSE AF charge could self ignite... this is a bad thing. Diesel engines do not have this requirement because they use Stratified Charge Compression Ignition.
    1
  2763. Rechargeable batteries are what really makes them inferior
    1
  2764. What killed the Mazda Rotary was they ran out of suckers to buy them... sales of the RX were terrible you can't build cars that don't sell.
    1
  2765. This engine only produces about 1 horsepower, thrust would depend on propeller efficiency... but these engines are heavier than comparable 2-stroke reciprocating RC engines.
    1
  2766. Indeed, that is why Mazda is launching its new ultra efficient Skyactiv-X 4-cylinder that can deliver 21st Century fuel efficiency on a range of renewable bio-fuels.
    1
  2767. Its directly related to 2 of the Wankel engine's fatal flaws... 1. extremely high EGTs due to low efficiency. and 2. ignition/combustion misfires due to low compression from damaged seals.
    1
  2768. Fastest propeller driven aircraft to see combat in WW2, 477 MPH.
    1
  2769. That is also incorrect, The Wankel KKM-57 design operates using the same Otto Cycle principle as most reciprocating engines. The Wankel does not have its own thermodynamic cycle in regards to the Carnot theorem thermal efficiency cycle. Not true, from Mazda's own experience with testing the vehicles in RX-8 Hydrogen-RE program, power and fuel efficiency were greatly reduced compared with gasoline(petrol) fuel operation and the test fleet vehicles suffered fewer failures and reliability problems when operating on gasoline.
    1
  2770. Every legitimate engine manufacturing company (including the 26 Wankel KKM licensee's and Mazda) have reached the same conclusion regarding the Wankel engine, that it is inherently inferior and offers no significant advantages over currently produced engine designs. The Wankel engines has been obsolete in the manufacturing industry since June 22nd. 2012... they have not been been produced anywhere in the world in over 7 years years.
    1
  2771. They are not made anymore.
    1
  2772. if youre lucky!
    1
  2773. Actually no, All Wankel engines use the 4-stroke operating principle
    1
  2774. Actually Mazda couldn't get anyone to buy them anymore... declining sales killed it.
    1
  2775. The Mazda RX-8 passed the world's toughest vehicle emissions standards (Califoria's CARB) right up until poor sales cancelled production.
    1
  2776. Most fans of the Wankel engine these days are adolescent boys... so its just targeted demographics really.
    1
  2777. Yeah, since these engines became obsolete you don't see much information about them anymore.
    1
  2778. RC engine fuel usually comes premixed. These engines are designed to run on nitromethane, not gasoline.
    1
  2779. There is only one method for determining the actual displacement and this is by calculating the Swept Volume for the Mazda 13B series this volume is exactly 3,924cc (3.9 liters) The problem is that the triangular piston (rotor) only operates at 3,000 rpm when the tachometer (reading output shaft rotation) reads 9,000 rpm. This is because of the extra 360° (the Wankel requires 1080° of eccentric-crankshaft rotation to complete its 4-stroke operating principle) instead of the usual 720° of the Otto engine. The Renesis really does displace 3.9 liters.. but requires 1080° of eccentric-crankshaft rotation to complete its 4-stroke operating principle.. if we compare it to 4-stroke Otto and Diesel engines? Engineers, legislators and motorsports sanctioning bodies all use the commonly accepted "2X" conversion formula that calculates the Wankel's displacement at 720° of crankshaft rotation. or 2.6 liters for the Renesis engine..
    1
  2780. It is common for them to last only 60k miles.
    1
  2781. No, There are no Diesel Cycle Wankel engines. Several failed attempts have been made but all were ultimately failures, the Wankel simply cannot support compression ignition because it cannot reliably generate high enough compression.
    1
  2782. The RX-8 is a fuckin shed... the worst RX ever sold, so bad it killed off the RX brand for good!
    1
  2783. Sales of the RX models steadily declined since 1986 due to the horribly notorious reputation for weak unreliable engines... The RX-8 was a major financial disaster for Mazda.
    1
  2784. Ernie Brink is a fraud... his engine does not run and does not offer any improvement, it is nothing but a scam
    1
  2785. Mr Brink is a crackpot, any competent engineer would understand that it is not possible to offset the pressure inside the combustion chamber as this would clearly violate Pascal's Law.
    1
  2786. Nitromethane fuel requires a very rich mixture because the fuel is heavily oxygenated.
    1
  2787. Sedan... a confused, poorly designed vehicle... its disappointing sales reflects this bad design.
    1
  2788. They did, the RX-8 and the MX-5 share the same platform... the MX got the better engine and is still a best seller.
    1
  2789. Not good... which is why these engines were not popular and were discontinued several years ago.
    1
  2790. On Aug. 19th 1944, Luftwaffe pilot Heinz Herlitzius took off from Flugplatz Leipheim and reached a record top speed in level flight for air breathing combat aircraft of 624mph (1004km/h) in a Messerschmitt Me 262  (an official DAC record). This was the fastest flight of a production combat aircraft until the F-86 Sabre in Sept 14, 1948 at 670mph.
    1
  2791. @David Elliot The Power Jets W.2 never entered production. The Rolls-Royce Welland and the Derwent were both designed by Adrian Lombard.
    1
  2792. The apex seals? The problem is its impossible to oil them very well... which is why these engine fail so quickly.
    1
  2793. Graupner GmbH discontinued these little Wankel engines years ago due to high failure rates and poor sales.
    1
  2794. This is not Felix Wankel's "Rotary" engine. The Wankel KKM (shown here) is a non-rotary layout engine design and was created by Hanns Paschke and Walter Froede without any knowledge or assistance from Felix Wankel.
    1
  2795. The RX brand was discontinued in 2012
    1
  2796. 'NLA' No Longer Available
    1
  2797. You understand that it most certain had a dead engine, which is all too common. If you owned one you would understand why it was just left for dead... horribly unreliable and not worth keeping.
    1
  2798. This engine has more parts than a comparable 2-stroke RC engine .
    1
  2799. Wankel engines were never successful in motorcycle production because the lack of compression braking typical found in convention engines... the Wankel's orbiting piston design was original developed as a supercharger compressor, when it was converted to run as an engine it essentially run "ass-backwards" to use a non-technical expression. Lol!
    1
  2800. The Mazda 13B engines had over 235 moving and seal related parts... as many or even more than some reciprocating 4-stroke engines... its the tiny fragile seal parts that people tend to overlook... they are also the primary failure mode as well.
    1
  2801. So did Mazda... they only make reciprocating engines now.
    1
  2802. You need to read and understand PASCAL'S LAW... because you're not much of an engineer son!
    1
  2803. The Graupner (O.S.) Wankel engines uses "glow ignition" a tiny platinum wire coil inside the chamber is heated with a battery to start, combustion heat keeps the wire incandescent (glowing red hot) and ignites the air/fuel charge. These engines requires a special fuel blend of nitro-methane to operate properly.
    1
  2804. Nothing but downsides actually, and this is also why the design is obsolete now.
    1
  2805. @Alexei Rivera - Technoclast Mazda did not cancel production of Wankel engines because of emissions... this is nothing but a false urban myth propagated my idiots that have no clue what they are talking about. Mazda discontinued the entire RX brand due to poor sales dating as far back to 1986. No automotive company can stay in business manufacturing cars that don't sell.
    1
  2806. @Alexei Rivera - Technoclast You don't know what the fuck you are talking about son... you are just a novice amateur.
    1
  2807. @Alexei Rivera - Technoclast The Mazda RX-8 was discontinued because of disappointing sales and financial losses due to the notoriously bad reputation the car quickly developed for being over-rated and unreliable.
    1
  2808. @Alexei Rivera - Technoclast WRONG!!! The Renesis engine EXCEEDED the highest emissions standards at the time production was cancelled 7 years ago.
    1
  2809. @Alexei Rivera - Technoclast California's ULEV II emissions standards EXCEED EURO-5... you look like a fool right now son.
    1
  2810. @Alexei Rivera - Technoclast DON'T POST FALSE URBAN MYTHS, ERRONEOUS FACTS AND OUTRIGHT LIES... You will be exposed as someone not educated or experienced enough to speak intelligently on this topic.
    1
  2811. Chris_Xing No, they are not... I guess you didn't hear the news last week?
    1
  2812. @Chris_Xing Mazda has not unveiled a new production Wankel engine in over a quarter of a century... No time frame means; no new Wankel engine.
    1
  2813. @Chris_Xing Wankel engines are obsolete technology... not a single one of the original 26 licensee engine manufacturers offer a Wankel engines today, not a single company in the entire world manufacturers them is series production... not even Mazda.
    1
  2814. Mazda is just paying lip service to naive rotards like you kid... they stopped working on prototypes over a decade ago and stopped selling them in 2012 because people won't buy them anymore.
    1
  2815. Mazda's CEO confirmed there will be no new Wankel engine next year and said they have no plans or time line to do so... so forget about seeing a new Wankel engine in Mazda showrooms because its not happening.
    1
  2816. The only one being stubborn here is you refusing to accept that Wankel engines are dead.
    1
  2817. @Собачья плоть Fully accredited YouTube user accounts may appear in bold in some countries.
    1
  2818. @Pikkon You obviously don't know what you are talking about kid... Wankel engines are inherently unreliable and I can prove it.
    1
  2819. @Pikkon No son, I just know a lot more than you do. I will prove it. Why is there not a single aircraft manufacturer selling a type-rated certified airplane with a Wankel engine anywhere in the world?
    1
  2820. @Ju Ri Warum hast du dann ein Problem mit der Wahrheit?
    1
  2821. @Ju Ri Super cool! wir sind uns also einig, dass der Wankelmotor minderwertig ist.
    1
  2822. @Ju Ri Cheers!
    1
  2823. @SkrtSkrttt The 13B MSP-RE is over 20 years old... Mazda has not unveiled a new production Wankel engine in nearly a quarter of a century!
    1
  2824. Wankel engines have an extremely poor combustion chamber shape and combustion dynamics which produces very poor combustion efficiency.
    1
  2825. Its a 4-stroke
    1
  2826. Its an obsolete Wankel engine... I'm surprised it even started....
    1
  2827. +Michael Yachnis "You're a fool" "Don't be a modern tech snob." Indeed, certainly from your own comments... aggression and low IQ definitely do go hand-in-hand.
    1
  2828. not really, the Wankel had some very significant design flaws that are inherent to its basic concept...
    1
  2829. Good question. Well, due to the limitations of the geometry, the Wankel cannot use a modern "quench effect" combustion chamber design, it has very poor combustion characteristics and efficiency as well as high thermal entropy because of the high surface area and the lower limit on static compression ratio. The Wankel simply does not convert the air fuel charge into heat efficiently and also due to the rather backwards design of mechanism, its triangular piston does not act upon its crankshaft with mechanical advantage, unlike reciprocating engines that produce mechanical advantage or "Leverage". A round or spherical shape is superior in dealing with thermal expansion and sealing... the Wankel's right angles and uneven sides pose is a serious seal design flaw, but the single wiper apex seal is also not a "positive type" seal like a modern "twist -type piston ring. Piston rings seal tighter as pressure increases, apex seal leak, vibrate and overheat as chamber pressure goes up. reciprocating engines can have 2, 3 or even more piston rings, while the wankel is limited to only a single apex seal. The Wankel cannot take advantage of variable valve lift or variable timing or compression. it is not well suited to support GDI technology either. cheers!
    1
  2830. They were discontinued years ago, no longer available
    1
  2831. Not made anymore.
    1
  2832. All of David Garside's inventions have been failures... He is responsible for Norton going bankrupt.
    1
  2833. Do you know the difference between Norway and Saudi Arabia??? Norway doesn't have camels!
    1
  2834. They are not made anymore
    1
  2835. Wankel engines are obsolete now... they no longer offer any advantages and are inherently inferior to the other types of engines still in mass production.
    1
  2836. @Vencejo Just the facts here son, The RX brand suffered from declining sales as far back as 1986, the FD sold very poorly and was a big financial loser for Mazda.... the RX-8 was hoped to turn around this trend but if failed miserably too and tarnished the brand's reputation beyond repair, Mazda permanently discontinued the RX brand in 2012 due to poor sales.
    1
  2837. Well, they still make cars with reciprocating engines... can't say the same about the dreaded Wankel motor.
    1
  2838. Not to mention Mazda lied about the RX-8s true power output, production models make at least 20hp less than advertised, and that is when they were new... they are also notorious for quickly losing power in as little as 10k miles.
    1
  2839. Yes, but Mazda engine isn't really compression ignition.
    1
  2840. RX-8 is actually a 3.9 liter in total displacement
    1
  2841. @ernie brink rotary hemi Why doesn't your Wankel engine run???
    1
  2842. Yes, because it was a blatant rip-off of a Porsche body styling...
    1
  2843. The General Motors RC2-206 Wankel engine looked promising in early lab tests, but in field testing installed in vehicles they had serious mechanical failures, short engine life and terrible fuel mileage.
    1
  2844. The RX-8 certainly did get a lot suspiciously kind and generous reviews... the problem was the RX-8 never lived up to any of these overly hyped-up reviews.
    1
  2845. The Wankel engine was less mechanically efficient and thus produced less torque... the Wankel is fundamentally inferior to reciprocating engines which is why they are obsolete today.
    1
  2846. If that was true? Mazda would have actually sold enough RX-8s to turn a profit... instead of replacing 10's of thousands of engines due to premature failures.
    1
  2847. That is why they didn't make any torque...
    1
  2848. +yjjeeper1 That is incorrect. The Rotary engine was invented by Felix Millet in 1892... before Felix Wankel was born. The engine you see here is the Wankel KKM this is the NON-ROTARY version invented by Hanns Paschke and Walter Froede... Not Felix Wankel.
    1
  2849. +Gosteriz The Wankel Rotary engine was never mass produced, only one example exists. Some people confuse "Mazda Rotary" brand Wankel engines as a Rotary type engine... which it is not.
    1
  2850. Wankel engines are obsolete
    1
  2851. Mazda only makes piston engines now.
    1
  2852. NSU invented the Wankel KKM engine... now part of VAG (Volkswagen-Audi Grouppe).
    1
  2853. I agree with your theory... True, anyone stupid enough to buy one of these cars is certainly too incompetent to properly care for any automobile properly...But there is one glaring flaw in your theory... people that had fully documented service by factory authorized dealers still encountered pre-mature engine failures at low mileages. The NHTSA recall investigation of the RX-8 found this too... its exhaustive investigation found NO LINK between owner abuse or neglect and Mazda DID NOT challenge this findings (Mazda was well aware by now) and voluntary recalled effected models.
    1
  2854. 100-200k miles is not typical... in fact these cars usually (despite still running) were suffering hard starting and flooding issues long before that mark... perhaps there are a few (less than 1%) this is not impressive at all compared to the vastly superior service life and reliability of reciprocating engines... Mazda's President and CEO said it could not consider bringing back the RX brand unless it could make significant improvements to its engines reliability.
    1
  2855. All Wankel engines suffer from poor reliability and shorter service life than comparable reciprocating engines, this fact is well known and understood throughout the engineering and automotive manufacturing industry... You seem almost naive regarding these well known facts. The RX-8 had even worse problems and these were well documented by the NHTSA and Mazda's numerous legal cases against them related to premature engine failure problems.
    1
  2856. All turbocharged versions of the Mazda 13b family are notorious for apex,side seals and coolant seal failures, which often leads to turbocharger failures as well... Mazda discontinued turbocharged Wankel engines over mounting concerns over premature engine failures and shorter service life than acceptable industry and consumer advocate standards.
    1
  2857. OH WOW! Do you get all your information from false urban myths??? Carbon build-up is cause by MISFIRES due to LOW COMPRESSION... if your Wankel engine is experiencing carbon build-up ITS ALREADY DAMAGED! Do you have any formal engineering or engine design training? You seem complete unaware of the primary failure mode that plagues the apex seals in a Wankel KKM type engine???
    1
  2858. Reliability refers to any unscheduled failure of a component or sub-assembly of components, the Wankel KKM engine design is well known for reliability problems of its core assembly, which in practical commercial applications such as automobiles requires complete engine removal tear-down and overhaul or complete replacement... this is a major unscheduled repair. The Mazda RX brand was actually not very popular in Japan at all due to poor fuel economy, most RX production was export and North America was, and still is Mazda's biggest market.
    1
  2859. Yes, carbon deposit accumulation is a common symptom incomplete or inefficient combustion due to Low Compression, in many engine designs including all gasoline fuel engines using the basic 4-stroke Otto Cycle or HCSI (Homogeneous Charge Spark Ignition). Son, Direct Gasoline Injection systems have been around since the 1930's and I have worked with DGI since the 1960's... the only difference today is computer controls which have started working with in the 1970's. If you think apex seal failures are caused by carbon deposits??? You know very little about the primary failure mode in Wankel KKM engines or engines in general.
    1
  2860. Sounds like your not well studied on the history of EVs
    1
  2861. Mazda confirms 100% Electric and Plug-In Hybrid but No Rotary Range Extender. https://thedriven.io/2019/06/11/mazda-confirms-100-electric-car-model-for-2020/
    1
  2862. I imagine that is because Australia has on average one of oldest vehicle fleets on the road... and now that Australia no longer has any automobile manufacturers this situation will likely continue.
    1
  2863. LATEST NEWS JULY 2019! MAZDA CONFIRMS NO ROTARY RANGE EXTENDER. https://thedriven.io/2019/06/11/mazda-confirms-100-electric-car-model-for-2020/ Reply
    1
  2864. Poor reliability and short service life is exactly why they are obsolete now.
    1
  2865. @Kaguya Houraisan You don't know much about Mazda do you kid?
    1
  2866. @Kaguya Houraisan I know what an RX-4 is... a car made long before you were born kid.
    1
  2867. @Kaguya Houraisan Today marks the 7th anniversary of the end of RX production, on Thursday June 21, 2012 at 4:30pm the final RX-8 car ever to be produced rolled off the assembly line, the last RX model to ever be produced by Mazda.
    1
  2868. @Kaguya Houraisan Run-along now and go back to you video games... you are finished here little troll.
    1
  2869. The RE5 was a dog
    1
  2870. These engines are obsolete because they have some very serious fundamental flaws in their basic design.
    1
  2871. +Cyka CheekiBreeki Obviously they were wrong...
    1
  2872. +Cyka CheekiBreeki The Rotary engine is very primitive, this is because it has been obsolete for nearly 90 years... I think you mean to say WANKEL engine? The Wankel KKM design is also obsolete... and this is because it reached the end of its development potential.
    1
  2873. Not much... The company that made these discontinued them because they were not very reliable.
    1
  2874. @Lyle Stavast Really? Because Diesel engines were exempt from emissions regulations in California until 1997 and were previously classified as a low-emission alternative fuel vehicles.
    1
  2875. Dr. Hanns Paschke and Walter Froede invented this engine... Felix Wankel had nothing to do with the design of the Wankel engine that saw production, Dr. Wankel hated this design.
    1
  2876. @Stan TheObserver Not true, the bigger the Wankel engine the greater the fuel consumption... increasing the DIAMETER requires a lower rpm to reduce the surface contact speed of the apex seals. Reducing rpm lowers BMEP and peak torque output.
    1
  2877. Can't buy them anymore... they were discontinued years ago.
    1
  2878. Waste of money... much better cars available, some for less money..
    1
  2879. You are hilarious dude! are you a professional comedian???
    1
  2880. NSU sold the licensing rights to the Wankel KKM engine design to several motorcycle manufactures. including; YAMAHA KAWASAKI SUZUKI BSA SACHS (HERCULES) sold to NORTON MZ (DKW) and VAN VEEN also made Wankel KKM powered bikes
    1
  2881. @Micah Bennett Here is a Rotary bike.. the MEGOLA, the one that inspired Felix Wankel. https://www.youtube.com/watch?v=c4Cq49IDfOc&t=54s
    1
  2882. @100GTAGUY Norton only sold WANKEL powered bikes... Not Rotary powered bikes.
    1
  2883. @100GTAGUY MEGOLA made Rotary powered bikes! https://www.youtube.com/watch?v=qAQuljp-atA&list=PLmhSXyOMooSlhNQZShFYxRRiz2pB_jl-g&index=12&t=0s
    1
  2884. @100GTAGUY Rotary engine bike MEGOLA https://www.youtube.com/watch?v=c4Cq49IDfOc&t=54s
    1
  2885. @Just A P39N Uh, Hey do you mind not trolling my comments? It's a bit annoying and a pain to delete them from my inbox. Other than that, I appreciate the thanks. Cheers!
    1
  2886. @John Burns Just the facts here Johnny... not like your false rumors!
    1
  2887. Sorry jonny but your false rumors never come true do they!
    1
  2888. Jonny please go down to your local Mazda dealer and see for yourself... your delusional fantasies about new Wankel engines are not true... they do not exist in the real world lad, it all in your crazy head!
    1
  2889. Yes jonny you are sad and tormented... by the false hope and phony rumors that Wankel engines are coming back... Rumors that never come true!
    1
  2890. Motor1 is an amateur blogsite... nothing but a clickbait rumor mill.
    1
  2891. Where is it Johnny??? Mazda has not revealed any new Wankel engines or Wankel powered vehicles since development was cancelled in back in May 2009.
    1
  2892. Wankel engines are obsolete technology... not even Mazda sells them anymore. Don't believe me? Just go down to your local Mazda dealer and see for yourself.
    1
  2893. There are no Wankel manufacturers... Wankel engines are obsolete.
    1
  2894. Hi Johnny did you psychiatrist give you some new meds???
    1
  2895. Johnny stop by your local Mazda dealer and see for yourself... they don't make Wankel engines anymore... Mazda dropped these unreliable engines like a bad habit years ago!
    1
  2896. I'm not making things up johnny... go down to your local Mazda and see for yourself. Mazda does not make them anymore... have not made them IN YEARS!
    1
  2897. That is right johnny, everything you say is made up...
    1
  2898. @WALTERBROADDUS Just the facts here my novice friend, some people are under the delusional impression that Wankel engines were not a massive industry wide commercial failure and are in a deep state of denial regarding the fact that the Wankel engine has been obsolete for many years.... even Mazda dropped this inferior technology like a bad habit.
    1
  2899. @WALTERBROADDUS You don't know much about the automotive industry do you son?
    1
  2900. @WALTERBROADDUS Its not an insult if its true, its just embarrassing for you.
    1
  2901. @John Burns Just the facts here Johnny, the Wankel engine is obsolete now, it now long manufactured in series mass production anywhere in the world today ... it is now the sole domain of crackpots and fools like you.
    1
  2902. @John Burns I know for a fact you are a liar... there is no 2020 Mazda RX-9 or any other Wankel engine vehicle offered by Mazda.
    1
  2903. @John Burns What’s Hot and WHAT'S NOT in the 2020 Mazda Lineup https://autowise.com/2020-mazda/
    1
  2904. @John Burns Johnny, you have been told over and over again, Mazda does not make cars with Wankel engines anymore... just go down to your local Mazda dealer and see for yourself.
    1
  2905. Unfortunately John Burns is infesting the comments of this video. He hates to accept that Wankel engines are long gone. Somebody please give him his meds and put him to bed, he gets tired when he has been ranting about laser ignition too long! LOL!!!!
    1
  2906. Hey Johnny! Can you please direct me to a new car dealership that has a new Wankel powered car for sale? I haven't seen any in fuckin YEARS!!!!!! Hahahaha!!!!
    1
  2907. If I had any medication I would send it to you dear boy... because you are DELUSIONAL!
    1
  2908. Then explain why are they obsolete in the auto industry kid?
    1
  2909. The only crook is Elon Musk.
    1
  2910. Just ignore Ernie... the guy is a troll and a complete nut job!
    1
  2911. ernie brink, why do you and "xke xke" post the exact same comments? Are you the same person?
    1
  2912. True, rotor speed is only 1/3rd of shaft speed.
    1
  2913. So only about 9,700 rpm why compared to a reciprocating engine.
    1
  2914. Wankel engines run very poorly and very inefficient using hydrogen or other gaseous fuels.
    1
  2915. Wankel engines are extremely inefficient... it also why they are obsolete.
    1
  2916. They didn't... sales were dismal and the car was a major flop... it was discontinued in the US and Europe long before production finally ground to a halt in Japan.
    1
  2917. This month marks the 10 year anniversary of Mazda's decision to cancel the RX-8, the entire failing and unprofitable RX brand and cancel further development of production Wankel engines... its been a quarter of a century now since Mazda unveiled a new production Wankel engine.
    1
  2918. You'd rather own a rwd underpowered car with zero hope of modding it? Yeah the RX-8 was a huge flop remember?
    1
  2919. Yeah, Mazda tuners seem to get their parts off of ebay... says a lot about Mazda owners...
    1
  2920. Indeed they did, The MX-5 is a huge success for Mazda and is the best selling sports car in the world under $50,000.
    1
  2921. Yes, it does mean its better... just the facts here.
    1
  2922. I've never seen a Mazda that can touch my M3 unless it has more invested in it than the M3 costs... of course they are still stuck driving a Mazda and not a BMW.
    1
  2923. The Mazda 787b was never banned, that is merely a false urban myth. Mazda announced in 1990 that it would retire the slow and very uncompetitive 787b after the end of the 1991 season. The FIA never banned the 787b or the Wankel engine...
    1
  2924. Mazda is the brand you buy when you can't afford something better..
    1
  2925. YOU DON'T ACTUALLY KNOW MUCH ABOUT CARS DO YOU?
    1
  2926. The Wankel engine? The Miller Cycle engine? The RX-8? Do you have a crack cocaine problem? Because you sound like a crackhead.
    1
  2927. The Wankel engine put Mazda into bankruptcy in the mid 1970's and was acquired by FORD in a court ordered bankruptcy sale! The Failure of the RX-8 required the Japanese Government to step in a guarantee $3 BILLION dollars in loans to bailout Mazda... Mazda board voted to end further development and production of Wankel engines as part of it recovery plan. Just the facts here... your lack of factual knowledge makes your argument weak.
    1
  2928. I'm am sorry you can only afford junkyard cars cobbled together with junkyard parts...
    1
  2929. All of my degrees are from public learning institutions... I don't come from wealth, my success is self-determined... The term "Ivy" league only refers to regional collegiate sports program by the way.
    1
  2930. English is not my native language and I did not major in English studies. Mocking my English skills won't prove your argument or make you look more intelligent. I'm actually considering trading my RS America for a 430... I don't particularly like the LaFerrari or any other hybrids.
    1
  2931. +David Schwartz Well, I see more than a couple LS swapped RX-8s out there now... I think the reason is not so much that the 1953 designed small block Chevrolet is the greatest design in history as much as the 1960's Wankel KKM design or the 1970's designed Mazda 13b series engine its based on are so horribly bad... when a completely stock LS motor produces +50% more power, double the torque! and still delivers better fuel economy and reliability? Its no wonder why the Wankel engine is obsolete now! Cheers!
    1
  2932. +David Schwartz The beauty of the SBC/LS series and what has made it so successful for so long is that it was very advanced for a automobile engine at the time it was introduced (flat-heads were still common), and the engine was simple and reliable.. Its basic design allowed it to be adaptable enough to take advantage of new advancements in parts and materials technology and its quench type (wedge) chamber combustion efficient enough to continue to meet current emission standards. Its availability and dirt cheap cost make it hugely popular in the custom and performance aftermarket... but it is also become so common in the US and Canada that it is frankly becoming a little boring, show up at a car show? And sometimes it is all you will see. The days of the OHV push-rod V-8 may soon come to an end in production cars... the one thing that the SBC cannot deliver is good enough efficiency to meet the upcoming fuel consumption and emissions standards for much longer.
    1
  2933. The center of the automotive engineering universe is still remains in Germany... where the automobile was invented, Japanese brands are all cheap copies of the original which always appears in Europe first... not Asia.
    1
  2934. @787brx8 Hey kid! Have you been by the local Mazda dealer to check out the new 2019 RX models??? Lol!!!!
    1
  2935. @787brx8 1.37 Million Older Mazdas Recalled for Risk of Ignition Fire https://www.caranddriver.com/news/a15352288/1-2-million-older-mazdas-recalled-for-risk-of-ignition-fire/
    1
  2936. @787brx8 Mazda to Recall 52,000 Tribute SUVs over Fire Risk https://www.autotrader.com/car-recall/mazda-recall-52000-tribute-suvs-over-fire-risk-148603
    1
  2937. @787brx8 Mazda recalls nearly 70,000 sports cars due to fire risk https://www.upi.com/Business_News/2016/11/15/Mazda-recalls-nearly-70000-sports-cars-due-to-fire-risk/2161479230351/
    1
  2938. @787brx-8 Hey kid! Have you had your car checked???? MAZDA RX-8 ON FIRE https://www.youtube.com/watch?v=wH4fTU-16J8
    1
  2939. @787brx8 MAZDA RX-8 ON FIRE!!! https://www.youtube.com/watch?v=QthCUo-Mb4s
    1
  2940. @787brx8 RX-8 with a FLAME JOB https://www.google.com/search?q=mazda+on+fire&tbm=isch&source=iu&ictx=1&fir=TijYJ7GlBNMieM%253A%252CPYD1o0jwLvavJM%252C_&usg=AI4_-kQgwaY2D696F5iQ2LsXKQUGJQOuhw&sa=X&ved=2ahUKEwjk4Zn8iqjgAhWrIjQIHQmhBdYQ9QEwAHoECAUQBA#imgdii=LPRdVyF3KMR5EM:&imgrc=9cXRcEp3ApFtUM:
    1
  2941. @787brx8 What left after your RX-8 catches fire https://www.google.com/url?sa=i&source=images&cd=&cad=rja&uact=8&ved=2ahUKEwistL2VjajgAhUmxlQKHbKVDXgQjRx6BAgBEAU&url=https%3A%2F%2Fwww.rx8club.com%2Frx-8-discussion-3%2Frx8-remnants-fire-pics-98860%2F&psig=AOvVaw1CqUBS6LppGLefvTb75Pbu&ust=1549576110368643
    1
  2942. @Mr kool Aid Man You said, quote; "I work at Notre Dame university and in the aerospace department they are working on a fuel that has the same properties as gasoline but acts like diesel." Please explain why you would want a gasoline fuel that acts like Diesel fuel??? and how that would solve the flaws in the Wankel engine?
    1
  2943. Graupner GmbH discontinued these engines years ago.
    1
  2944. Nah... its no fun waiting for your dead battery to recharge...
    1
  2945. NO THANK YOU, I PREFER MY PLASTICS NON-GMO.
    1
  2946. Dude, seriously? It was a JOKE!
    1
  2947. Mazda ceased production of the RX-8 years ago... it was a major flop in terms of sales figures and lost a lot of money.
    1
  2948. ICEs are not going anywhere... They are here to stay, because there simply is nothing better available.
    1
  2949. R.I.P. Wankel engine 1964 - 2012
    1
  2950. NSU MotorenWerkes AG. (the company that invented the Wankel engine) went bankrupt and was purchased by Volkswagen becoming a division of Audi The new company abandoned development of Wankel engines just like the rest of the 26 companies including Mazda that bought the rights to build them.
    1
  2951. The Carnot formula tells us that it is impossible to reach 100%... it also tells us that the Wankel will always be less efficient than reciprocating 4-strokes. The 16X program was cancelled way back in May 2009... Mazda cancelled all research and development on Wankel engines the same year.
    1
  2952. The Wankel engine is already dead... 1964 - 2012
    1
  2953. All Wankel engines use the 4-stroke principle.
    1
  2954. Actually a comparable 2-stroke reciprocating engine this size has fewer parts. pre-mix lubricationis not unique to any engine type
    1
  2955. The Wankel engine was not killed off by the EPA.. Mazda and all the other manufacturers discontinued them simply because they did not sell.
    1
  2956. Then why do they get horrible fuel economy and make no torque???
    1
  2957. Its an obsolete engine as well...
    1
  2958. Good comment
    1
  2959. All Wankel engines operate using the 4-stroke principle
    1
  2960. So its still running? do you drive it every day????
    1
  2961. Wankel KKM made by Graupner GmbH.
    1
  2962. Clearly you are not familiar with Wankel engines...
    1
  2963. NO
    1
  2964. These engines were designed and manufactured by Graupner GmbH. primarily for RC planes... but they offered mediocre performance at best. Wankel engines are very poorly suited to aircraft applications and there has never been any production passenger aircraft powered by a Wankel for this reason.
    1
  2965. You would have to be stupid or corrupt to buy a solar roof... if it sounds like a scam and smells like a scam? ITS A SCAM!!!!
    1
  2966. Discontinued years ago...
    1
  2967. Sorry, Mazda was the very last company to manufacture Wankel engines and they abandoned the design over half a decade ago.
    1
  2968. +Andrew Wankel engines have been obsolete in the engine manufacturing industry for several years now..
    1
  2969. +Mike The Mechanic Can you explain how the fuel injector "heats" the fuel?
    1
  2970. Ernie Brink, Can you please explain why your engine does not run at all????
    1
  2971. @Vladimir Lucifer The injector doesn't heat the fuel dummy... you don't know anything about fuel injection do you???
    1
  2972. @Vladimir Lucifer Well, its obvious you are no engineer... the fuel pump is cooled by the fuel and so the undergoes some heating during pressurization. The Injector however releases pressure... thus COOLING the fuel.
    1
  2973. @Vladimir Lucifer Well if your dumbass theory was true.... modern refrigeration and air conditioning would not work... a trip to the frig to grab a beer proves you are a complete moron.
    1
  2974. @Vladimir Lucifer But we are not talking about the fuel pump dummy... we are talking about the INJECTOR
    1
  2975. *WRONG! Heat is added when a fluid is compressed or pressurized. The Injector RELEASES pressure which cause cooling. The fuel goes from a high pressure liquid and is atomized and vaporized. This PHASE CHANGE cause a significant DROP in temperature.*
    1
  2976. @Vladimir Lucifer You obviously do not understand the concepts of Latent Heat or Fluid Dynamics...
    1
  2977. @Vladimir Lucifer You do not understand how fuel injection works or the basic fundamentals of refrigeration or automotive air conditioning. Automotive air conditioning works by compressing a refrigerant gas into a liquid under pressure and is release via a injector nozzle into the evaporator where in cools by absorbing latent heat as the pressure drops and the liquid evaporates into a vapor/gas.
    1
  2978. @Vladimir Lucifer YOU ARE WRONG! You are just too ignorant to understand why you are wrong.
    1
  2979. @Vladimir Lucifer Yes, the evaporating fuel DOES COOL THE AIR DUMMY!
    1
  2980. @Vladimir Lucifer I can only assume because you are stupid and do not understand anything going on in the world around you. You clearly do not understand thermodynamics or fluid dynamics and apparently the concept of Latent heat is completely unknown to you.
    1
  2981. @Vladimir Lucifer The only defect here is in your brain son... stop pretending to be educated as a scientist... you are not fooling anyone.
    1
  2982. @Vladimir Lucifer You are an idiot, please stop pretending to be something your are not.... educated.
    1
  2983. @Vladimir Lucifer The injector releases the pressurized fuel causing it to Atomize and Vaporize this evaporation causes COOLING The Fuel injector does not heat the fuel IT COOLS THE FUEL as it enters the engine.
    1
  2984. @Vladimir Lucifer The injector does not HEAT the fuel.
    1
  2985. @Vladimir Lucifer What does a HYDRAULIC system like gasoline Fuel injection have anything to do with "Pneumatics"????
    1
  2986. @Vladimir Lucifer Sorry kid, but you are not fooling anyone here with your tech gibberish nonsense.
    1
  2987. @Vladimir Lucifer WRONG! The combustion recesses in the piston/rotor face have NO EFFECT on displacement as they are not part of the swept volume of the engine.... you need to learn what DISPLACEMENT is and how it differs from STATIC COMPRESSION RATIO!!! Again you FAIL!!
    1
  2988. @Vladimir Lucifer WRONG AGAIN KID! Pneumatics is the study and application of compressed air and gases... not liquids, that is called Hydraulics
    1
  2989. @Vladimir Lucifer Keep up son, the more you talk the dumber you look.... I don't have to make you look like a fool... you are doing all by yourself! Lol!
    1
  2990. @Vladimir Lucifer WRONG! The Injector does not heat the fuel... it causes it to COOL.
    1
  2991. @Vladimir Lucifer WRONG DUMMY! the study of fluids is called FLUID DYNAMICS
    1
  2992. @Vladimir Lucifer No! It Does not... if vapor forms between the pump and the injector? The engine will stumble and die, this fault condition is called VAPOR LOCK
    1
  2993. @Vladimir Lucifer WRONG! Fuel injectors evaporate fuel due a sudden DROP in pressure... this effect causes COOLING
    1
  2994. @Vladimir Lucifer I'm not going anywhere dummy, I will just keep pointing out your stupid mistakes.
    1
  2995. @Vladimir Lucifer The injector will cool the fuel and the surrounding air due to the Latent Heat of Evaporation... they do not teach thermodynamics in your 7th grade classes.
    1
  2996. @Vladimir Lucifer VAPOR LOCK
    1
  2997. @Vladimir Lucifer "The study of the FLOW of the girls and behaviors are fluid dynamics." I think you need to study the flow of girls... because you suck at Fluid Dynamics.
    1
  2998. @Vladimir Lucifer Evaporation causes COOLING
    1
  2999. @Vladimir Lucifer The injector does not heat the fuel IT COOLS IT!
    1
  3000. @Vladimir Lucifer I think you need to move to a country with better schools.
    1
  3001. That's a skookum choocher aye!
    1
  3002. Mercedes unveiled their version 11 years ago...
    1
  3003. No torque or durability either...
    1
  3004. Tesla cars are junk!
    1
  3005. Wow! you're not the sharpest tool in the shed are you?
    1
  3006. No...
    1
  3007. Because the Wankel engine is inherently less efficient than reciprocating engines, they never run as well and that is why they are no longer made.
    1
  3008. All Wankel engines use the 4-stroke principle
    1
  3009. True, Mazda probably won't be around much longer... most likely they will be bought out by Toyota.
    1
  3010. How is that any different than a reciprocating engine?
    1
  3011. I'm sorry, you seem very confused about how the Wankel engine works... each of the 3 combustion faces acts exactly like a piston.. so you can't compare it to a single piston engine... only a 3 cylinder 4-stoke reciprocating engine which also has more than one stroke at the same time.
    1
  3012. Like the Tesla cars burst into flames??? theyre not even british either.
    1
  3013. This has MORE parts than a comparable RC engine.. The Wankel engine had a lot of design flaws inherent to its basic geometry which could not be resolved.. it was found to be inferior to reciprocating engines eventually becoming obsolete.
    1
  3014. Mazda became a Wankel KKM licensee in 1961 when it purchased the rights to build them from NSU MotorenWerkes GmbH. in Germany... This engine is made by Graupner GmbH. in Germany.
    1
  3015. That is why it doesn't seal very well. Reciprocating 2-stroke RC engines have fewer parts and are superior in all respects.
    1
  3016. NO ROTARY ENGINE June 6th, 2019, Mazda's President says no rotary range extender on the way, says quote "we had to put this on the back burner, and we have no time frame." https://europe.autonews.com/automakers/mazda-counts-evs-reach-eu-co2-goal
    1
  3017. Name a major automotive manufacture that receives up to $10,000 dollars in tax payer funded subsidies per car and still sells every car at a loss??? Elon Musk just made another $2.6 BILLION dollars and is asking for another $55 BILLION!!!!
    1
  3018. "Tesla is among the most shorted stocks in the United States. More than a quarter of its stock valued at more than $11 billion is being shorted, according to S3 Partners." https://www.nytimes.com/2018/08/17/business/dealbook/elon-musk-tesla-short-stock.html
    1
  3019. 124 mile range is terrible... why would anyone pay the same price for a vehicle with LESS performance???
    1
  3020. Yet Nissan and Tesla LOSE money on every EV model sold... doesn't sound like a sustainable growth or long term business model.
    1
  3021. The Toyota Mirai is ZERO emission too but has a 320 mile range and can be refueled in minutes... it even comes with FREE FUEL for 3 years!
    1
  3022. +mosaic Then why did people stop buying them?
    1
  3023. +Haz Old If you were going to go to all the trouble and expense of using second pass heat recovery? You would be better off starting with an engine that has higher Carnot Cycle efficiency than the Wankel, as each following pass delivers diminishing returns in efficiency gains overall.
    1
  3024. +BAYAREAMX That's why we use the EPA 'drive-cycle' lab test to quote MPGs... this eliminates any spurious human or environmental influences on the test data results and gives of an accurate comparison between two vehicles of similar power and weight.
    1
  3025. +MJR Performance Really? Thats odd because Mazda's CEO says they are not and there was no Wankel engines at the Tokyo auto show with the other 2019 models????
    1
  3026. +Phillip Jones Interesting? "no unburned fuel in the exhaust"? Then explain why the Wankel engine produces higher exhaust gas temperatures and higher HC and CO tailpipe emissions?
    1
  3027. +Phillip Jones OH WOW! You really don't have a clue what you are talking about...
    1
  3028. +Phillip Jones Wrong, the Wankel had a significantly higher Carnot T2 value.. this is directly related to the Wankel engines higher rate of heat rejection in the conversion process. This high heat rejection is observed as a higher EGT value for a comparable BSFC value
    1
  3029. +Phillip Jones NO! I mean CO as in Carbon Monoxide.. You seem to be completely unfamiliar with vehicle emissions fundamentals or regulations... this is a critical indicator of combustion efficiency when the AFR value is known.. CO values are also a very good indicator of AFR. The Wankel engine produces significantly higher levels of this poisonous and regulated exhaust gas product.
    1
  3030. +Phillip Jones Wrote, quote; "high EGT is ALWAYS an indication of high combustion efficiency," BULLSHITE! you sir, are a fake and a fraud! Nothing more than a crackpot! I suggest you study the Carnot Cycle formula before you try to masquerade as an engineer...
    1
  3031. +Phillip Jones "Do you mean NOx?" Wrong again... the production of NOx is determined by PRESSURE, OXYGEN RATIO and temperature.
    1
  3032. +niecers Mazda purchased a licensing agreement from NSU to develop and produce its Wankel KKM design in 1961... well before emissions and lead free fuel regulations. The Wankel design was licensed by 26 major engine manufacturers but most of them abandoned the Wankel around the time of the OPEC Oil Crisis due to the designs notoriously poor fuel economy, Mazda attempted to launch an all Wankel powered model line just as the Oil crisis peaked and the company was plunged into bankruptcy for the second time in its history...
    1
  3033. +Chuckiele All Wankel KKM designs use the 4-stroke operating principle, 2-stroke Benz-cycle engine have fewer parts, and can actually rev higher. The 2-stroke reciprocating concept is vastly superior in all aspects to the Wankel and is still in mass production while the Wankel has become obsolete.
    1
  3034. +Chuckiele Not true, The Wankel engines inherently weak sealing system and poor combustion efficiency make it poorly suited to high manifold pressure forced induction. GDI was already tried back in the 1960's but the Wankel simply cannot support the high static compression ratios required to achieve significant performance gains with direct-injection stratified combustion. HCCI??? How? Its not possible to adapt VCR, VVL or VVT to the Wankel... its limited to port induction and exhaust and does not generate high enough static compression. The Wankel is obsolete... for some very good reasons... it is an inferior design that no longer offers any further development potential. RIP 1964 - 2012
    1
  3035. +Chuckiele Well, you must have clicked the wrong tab because you posted your erroneous, highly speculative fantasy theories for the whole world to see, I responded to everyone and my message was intended as a direct rebuttal of the completely false statements you posted for everyone to see. Next time if you want keep your remarks private (and not embarrass yourself again) remember to reply by private message instead, good day to you sir.
    1
  3036. +Chuckiele Your entire comment was filled with nothing but errors, false myths, unsupported speculations. Please, stop living in a state of denial... the Wankel design has been obsolete for several years with absolutely no evidence that it can or will ever make a comeback... it is simply an inferior design concept.
    1
  3037. +Chuckiele Please name the one key technical feature that effects combustion efficiency that all modern automobile engines have that is not possible to have in a Wankel engine?
    1
  3038. +Chuckiele Engineering is not a "faith based" endeavor son, it is a science that must comply with the laws of mechanics, and the laws of thermal and fluid dynamics. Mazda manufactured the Wankel KKM longer than any other company and they have not released a new production Wankel engine in 23 YEARS! So I sincerely suggest if your hoping for the Wankel to comeback? That you don't hold your breath!
    1
  3039. +Chuckiele "technical feature that effects combustion efficiency" NO, its not. Indeed, while one of the Wankel KKM's flaws is being limited to port induction and exhaust that is not what I was referring to.
    1
  3040. +Chuckiele "I dont see a reason to implement them into an engine that doesnt even need valves," WELL THEN, How do you expect to implement HCCI technology????? Magic? or Hope
    1
  3041. +Chuckiele Lol!!!! Wow! you really are delusional son... True, Elephants really can fly if you do enough drugs. What is your poison? Do you smoke a lot of weed? or is it Molly?
    1
  3042. +Chuckiele Its Not? Are you not familiar with the Mercedes-Benz Diesotto technology demonstrator? That was unveiled a decade ago? https://www.youtube.com/watch?v=N-kYwaUBwZM
    1
  3043. +Chuckiele "HCCI isnt even properly utilized with valve control yet," You have to see the irony in that comment... as MAZDA will be the first on the market with its hybrid HCCI engine in 2019. https://insidemazda.mazdausa.com/the-mazda-way/technology/mazdas-skyactiv-x-breaks-cover/
    1
  3044. +Chuckiele You can't even fully understand basic fundamentals of engine operation yet... The Wankel KKM and HCCI technology appear to be well beyond your ability and skill level son.
    1
  3045. +Chuckiele I don't think you take anything seriously... certainly not automobile engineering.
    1
  3046. +Abil Harsono Just the fact here, go troll somewhere else kid.
    1
  3047. No, Skyactiv-X is a reciprocating engine type.
    1
  3048. Graupner GmbH. discontinued these unsuccessful engines long ago. They are not made anymore... the Wankel engine has been obsolete for several years now.
    1
  3049. Mazda discontinued production of Wankel engines several years ago.
    1
  3050. @ziiofswe Well, that is not why they sound like 2-strokes.
    1
  3051. The next big oil crisis is coming sooner or later it will happen again... Mazda doesn't want to get caught with its pants down like it did the last two times... Mazda may not survive another bankruptcy.
    1
  3052. Sort of, but just some of the time...
    1
  3053. that don't sell..
    1
  3054. That is why the MX-5 is one of the best selling sports cars in history... and the RX-8 was and still is a horrible abomination... the curious thing is how it ever got made in the first place..? Mazda lost billions on the -8
    1
  3055. fugly...
    1
  3056. It been done, Sachs made Wankel lawn mower engines.... but they sucked.
    1
  3057. Its not, Mazda's CEO said they have no plans to revive the discontinued engine. The Wankel is now an obsolete technology... it is no longer commercially viable because it simply cannot compete with modern reciprocating engines.
    1
  3058. Wankel engines are obsolete... inferior technology.
    1
  3059. BEVs will never replace ICE vehicles... batteries are a hopelessly inferior technology that will never match the energy density needed to replace liquid hydrocarbons.
    1
  3060. Not without adding even more fuel... HCSI (Homogeneous Charge Spark Ignition) requires a relatively rich mixture to achieve reliable combustion... and YES its been tried, with very poor results.
    1
  3061. @6Twisted Bullshit! O.S. engines lists the model 49PI at just 1.27 horsepower max. with max. RPM of 18,000.
    1
  3062. @Martin Larson Only 200 horsepower per liter, on nitromethane... pathetically embarrassing.
    1
  3063. @wing_nut_101 Wankel engines are not made anymore, this engine was discontinued years ago, might find a used one on ebay.
    1
  3064. @EnricoAwsome 1.2 hp for a nitro 5cc engine??? Not impressive at all.
    1
  3065. Wankel engines are not made anymore... they have been obsolete for some time
    1
  3066. People don't buy RXs... which is why Mazda discontinued them.
    1
  3067. Mazda discontinued these unpopular cars years ago... go down to the Mazda dealer and see for yourself.
    1
  3068. Wankel engines do not offer any advantages compared to current reciprocating engines and have several very serious, fatal flaws that have never been solved or cannot be solved.
    1
  3069. Several major motorcycle manufacturers (including the company that invented the Wankel engine "NSU") have developed Wankel engines for motorcycle but all proved to be colossal failures.
    1
  3070. Its horsepower is 1.27 bhp and it is a 4.9cc (14.7cc's total displacement)
    1
  3071. Mazda doesn't use them anymore either... no one does now. RX engine production was permanently cancelled and ceased on June 21st. 2012.
    1
  3072. The Wankel engine is not popular for anything... which is why they are no longer sold.
    1
  3073. +Von Huxley climate has been changing since long before the Oil Industry got started... The National Academy of Science says Electric Cars will cause even greater CO2 emissions.
    1
  3074. Rest in Peace Wankel engine 1964 -2012
    1
  3075. @SidewaysGts How long are you going to continue in your futile effort to kill the messenger??? I'm not the one that made the Wankel engine obsolete son.
    1
  3076. @SidewaysGts What is it that you hope to accomplish here? Trolling my comments won't bring back the Wankel engine from extinction.
    1
  3077. @SidewaysGts I don't think you make a very fun zoo exhibit at all son... you're just too bitter and angry all the time.
    1
  3078. @SidewaysGts Just the facts here son, just the facts.... you do not intimidate me or the truth in the slightest.
    1
  3079. @SidewaysGts Wankel engines are obsolete in the engine manufacturing industry, not a single legitimate manufacturer produces one in series mass production... not even Mazda makes them anymore, Wankel engines are dead. Nothing you can say to me will change these facts.
    1
  3080. @SidewaysGts I'm still here... the only thing that is gone is the Wankel engine. Nothing you can say will change these facts.
    1
  3081. No, All Wankel KKM engines use the exact same 4-Stroke operating principle as the reciprocating Otto engines... the only difference is the Wankel requires 1080° of rotation to complete its firing order sequence instead of 720°.
    1
  3082. Ernie Brink, why doesn't your engine run?
    1
  3083. But why doesn't your engine design work???
    1
  3084. Yes, but not very well.
    1
  3085. Severely flawed design, unstable thermal expansion and inherent weak sealing system that is prone to damage from erratic combustion.
    1
  3086. Engineering Failure.
    1
  3087. We don't miss the RX-8... it's a shed!
    1
  3088. Not anymore...
    1
  3089. The incomplete/poor combustion characteristics is what made these engines unreliable and very inefficient. Mazda managed to get the Renesis (RX-8) engine to pass the strictest emissions standards in the world right up until lack of sales killed off the entire brand back in 2012.
    1
  3090. What do you think the AFR is on these engines???
    1
  3091. That was already invented in 1892 by Felix Millet...
    1
  3092. ROTARY engine stupid! The Rotary engine was invented by Felix Millet in 1892!
    1
  3093. I think we have one of those "Rotards" that doesn't understand the difference between a WANKEL engine and a ROTARY engine... I guess this guy never went to school.
    1
  3094. Not true, these engine only run on an extremely rich mixture... they just have very poor combustion efficiency which is why Wankel engines are obsolete today.
    1
  3095. Obsolete with Mazda too. Mazda has not developed a new production Wankel engine in 25 years and all production ceased over 7 years ago.
    1
  3096. I'm not sure you are actaully familiar with this type of engine, this Graupner GmbH./O.S. 49PI engine has no spark plugs and runs on nitromethane which requires an extremely rich AFR.
    1
  3097. Wankel engines cannot have a efficient quench type combustion chamber due to the internal geometry of the engine. Wankel engines are obsolete because they have poor combustion, poor thermal and very poor mechanical efficiency. They simply do not convert energy in the fuel into heat very well nor do they convert what little heat they do make into mechanical work.
    1
  3098. unfortunately they were not very fast or reliable...
    1
  3099. EGRs don't save gas... they reduce fuel efficiency, less oxygen mean colder combustion... less heat means less power.
    1
  3100. It is sad how many people flunked economics...
    1
  3101. @Jekrispy Leave these overpriced piles of junk for the suckers... never premix a car with oil injection. Premixing is the most ignorant urban myth surrounding these unreliable cars... don't waste your money pour oil in the gas tank, it won't save your apex seals, it only damages the engine and the fuel system.
    1
  3102. Why would any of the major manufacturers campaign a Wankel engine in F1???
    1
  3103. @Márton Léránt Yet F1 has the most fuel efficient engines in any world class racing series....
    1
  3104. @Márton Léránt Do you realize your knowledge of Formula 1 is even worse than your knowledge of Wankel engines??? F1 has not used 2.4 liter V-8 engines in many years... the current F1 spec engine is a 1.6 liter V-6 turbo-compound engine RPM limited to 15,000 with parallel hybrid drive system...
    1
  3105. @Márton Léránt That is right son, Racing is about ADVERTISING and F1 manufacturers are selling small turbocharged engines and electric hybrids.... Wankel engines are completely obsolete in the automotive industry.... SO WHY? would anyone invest hundreds of millions of dollars promoting a product it does not sell anymore????
    1
  3106. @Márton Léránt And yet Formula 1 cars are the ultimate of world class road course Motorsports competition anywhere on the planet... and the most watched sporting events series in the world. Really? because F1 is often criticized for being too much of a manufacturer series and not a driver's series... Many Motorsports series formulas require completely IDENTICAL cars and engines... leaving the competition and race results entirely up to the skills of the drivers and the pit crews.... not the engineers.
    1
  3107. @Márton Léránt Its very obvious from the shear volume of factual errors and wildly speculative theories you have offered in you comments that you are an amateur enthusiast of very limited experience and education. Your childish insults and personal bias also reveal a very limited maturity and cultivation.
    1
  3108. @Márton Léránt You have already proven you don't know anything about F1 or Wankel engines... so why should anyone care what you think?
    1
  3109. @Márton Léránt The FIA did not technically ban any engines, it simply agree to a one engine formula... and since none of the manufacturers in F1 produced Wankel engines or gas turbines it was a completely moot point, you can't ban something that has never competed in F1 or is even being considered for competition in the F1 series.
    1
  3110. @Márton Léránt Jet engines and gas turbines unlike Wankel engines are not obsolete in the manufacturing industry... they are just not sold in automobiles so no automotive manufacturer would have any interest in promoting them.
    1
  3111. @Márton Léránt Wankel engines work, they are simply inferior to reciprocating engines and gas turbines and thus cannot compete against them in the commercial market... There would be no point to developing and campaigning a Wankel in Motorsport today as there is no reason to promote them... they are no longer available, there would be no economic pay-back or incentive to do so.
    1
  3112. @Márton Léránt Yes, I have proved again that you are not knowledgeable or educated enough on the topic of F1 or Wankel engines to speak intelligently on them, and thus completely discrediting your biased opinions and false theories regarding them.
    1
  3113. @Márton Léránt You wrote, quote; "f1 looooong ago stopped inovation," You have to see the irony in that statement, as some that was completely unaware of current F1 engine innovations showcased in the series and completely unaware that Wankel engines are not only far from innovative... they are in fact completely obsolete automotive technology now.
    1
  3114. @Márton Léránt False, the FIA is the official regulatory sanctioning body that oversees all aspects of F1 rules and regulations.
    1
  3115. @Márton Léránt Gas turbines are perfectly CAPABLE of propelling an automiobile... the point is there are no automotive manufacturers SELLING THEM... thus their conspicuous absence from world-class, professional automotive Motorsports.
    1
  3116. How will you repay your share holders?
    1
  3117. The Graupner GmbH. 49 PI uses ball bearings on the eccentric-crankshaft. There are no side or face seals, the air/fuel charge flows through the triangular piston(rotor) in a similar fashion to a piston-ported 2-stroke engine. My sincerest condolences, it must be horrible living in such a terribly poor, backwards little island like Puerto Rico, that is as far from the epicenter of the automotive universe as you can get... PR is one of those places too poor to import many new vehicles and is where lots of old obsolete junk goes to die... Cheers!
    1
  3118. Ernie why doesn't your engine run????
    1
  3119. There are no Diesel Wankel engines available and none were produced other than a few made by Yanmar which were recalled and later scrapped.
    1
  3120. @Pukudo No, there are not.. many designs were attempted but all were commercial failures or canceled before reaching production.
    1
  3121. @Pukudo As I said several failed prototypes existed in the past, but this type of engine IS NOT SOLD and IS NOT IN USE anywhere in the world today... I don't think you can explain something that does not exist onYouTube or anywhere else for that matter!.
    1
  3122. @Pukudo You sir are a FAKE and a LIAR! No such engines exist and you cannot prove some fake bullshit that you just made up. Please stop spreading lies and false information about fake engines that do not exist.
    1
  3123. @Pukudo You sir are confusing a Diesel cycle Wankel with something that is clearly not because they do not exist in service... and for good reason, it is well understood that such designs fail due to basic, inherent deficiencies that prevent the Wankel KKM from supporting the Diesel Cycle operating mode. Please refrain from posting false, erroneous or otherwise misrepresented information on topic such as this that you clearly do not understand.
    1
  3124. @Pukudo Childish insults won't prove your lies... and they won't make you look smarter either.
    1
  3125. @Pukudo Your responses are nothing but a very immature reaction to being caught in an outright lie... you just need to grow up kid and admit the truth, because you are not fooling anyone here... certainly not me.
    1
  3126. @Pukudo YOU ARE A FAKE! AND A FRAUD! You cannot prove your ridiculous false claims because they are ALL LIES!!!!
    1
  3127. Wankel engines are inherently inferior to other types engines and no longer offer any significant advantages.
    1
  3128. then why are they not made anymore?
    1
  3129. All Wankel engines use the same 4-stroke operating principle as the Otto engine.
    1
  3130. Never hire a guy missing a finger...
    1
  3131. never gonna happen
    1
  3132. Interesting theory? But why would any automotive engineer select a Wankel engine to maximize fuel efficiency and reduce exhaust emissions???
    1
  3133. Not exactly... while Diesel engines produce far less of the invisible kinds of pollution, they still produce invisible NOx emissions which can cause lung tissue damage and cancer.
    1
  3134. They didn't make much power for their displacement or fuel consumption
    1
  3135. Did you haul livestock in it too???
    1
  3136. It is a Wankel KKM-57 type engine manufactured by Graupner GmbH. and discontinued years ago.
    1
  3137. Are you an ozzy?
    1
  3138. I thought that old bag was dead...?
    1
  3139. That's is true only if you forget to count all the tiny, fragile little seal components that cause them to be so unreliable...
    1
  3140. Not anymore...
    1
  3141. +Peter Jörgenson Then why aren't new car buyers going for electric models?
    1
  3142. +Thomas Wills That's right Tommy, rechargeable batteries will never be match liquid fuel... I guess you have to know something about engineering to understand this?
    1
  3143. +badboy 25 REALLY???? Then how do you explain those 100 MILLION new ICE cars sold this year?????
    1
  3144. +Paul Ciorogar Now, that is imagination!
    1
  3145. +Weird Music What makes you think "Mazda RX-7" is a child?
    1
  3146. +Daniel You must be too young to understand.
    1
  3147. Don't listen to Kevin Loving he's a paid Mining Company shill he shows up in the comment section of most of these electric car videos.
    1
  3148. +TheSteamBreaker This guy is some kind of crackpot conspiracy theory nut job... no such technology exist in any practical or commercially viable form.
    1
  3149. Not anymore... Wankel engine R.I.P. 1964 - 2012
    1
  3150. Dude with an RX-8 looked sad sitting in the tow truck... dragging his car with a dead engine back to the Mazda dealer for the third time...
    1
  3151. That is exactly why they don'y make them anymore...
    1
  3152. Not detonation... the process is called Deflageration.
    1
  3153. Wankel engine were extremely inefficient... that is why they are not made anymore. obsolete technology
    1
  3154. Not anymore..
    1
  3155. +Chad Bremer You seem to make a lot of false assumptions... generally based on a lack of personal knowledge and education.
    1
  3156. +David DiStefano The biggest difficulty with the Wankel KKM design is it's lack of any significant advantages or commercial viability... Sales of Mazda's RX brand steadily declined since the 1980's to the point where Mazda could not even keep a production line running.
    1
  3157. +Chad Bremer Just the facts here Chad... it not my fault if you chose to deny the truth.
    1
  3158. +Chad Bremer Then why has Wankel engine production been completely abandoned by all the automobile and engine manufacturers???
    1
  3159. Europe never banned Wankel engines, Mazda discontinued the RX brand due to lack of sales. Sales of the RX had been in steady decline since 1986 and by the 21st century the brand was mounting losses in the billions of dollars, cash the company desperately needed.
    1
  3160. @Márton Léránt The Wankel engine was universally a massive commercial failure. There has never been a successful production aircraft that used a Wankel engine. There are no Wankel engines reliable enough to pass either the FAA or EASA air-worthiness certification. The Gas Turbine engine offers an order of magnitude greater power-to-weight performance than any Wankel engine.
    1
  3161. @Márton Léránt Yet Gas Turbines DOMINATE commercial and military aircraft production... because of their vastly superior power-to-weight ratio, reliability and fuel efficiency.
    1
  3162. @Márton Léránt Several aircraft and aircraft engine manufacturers have invested millions into Wankel engine development and all have reached the same conclusion, which was the Wankel was inherently inferior to gas turbines and existing reciprocating engines.
    1
  3163. @Márton Léránt The issues with poor reliability and short service life that have plagued the Wankel engine since its introduction is infamous. Mazda has suffered pre-mature failure rates that exceeded 50% under the warranty period... in automobiles its just bad business.... in the aircraft industry it can be criminally negligent homicide.
    1
  3164. @Márton Léránt Gas turbines are used in helicopters, military vehicles, marine, stationary pipeline pumping applications and are growing in popularity in electric power generation.
    1
  3165. @Márton Léránt Doubtful, ultra-light applications are on the very low-end of the aircraft industry and require minimal cost and maintenance to be affordable. Piston engine manufacturers such as Rotax GmbH. dominate the ultra-light industry... Rotax was the World's First manufacturer of Wankel engines in 1964 (Fichtel&Sachs) but completely abandoned the Wankel by the mid 1970's as improvements in 2-cycle and 4-cycle reciprocating engines that offer superior performance at a lower cost and offer greater reliability.
    1
  3166. @Márton Léránt Wankel engines are inherently inferior to reciprocating engines they failed to replace, they are an obsolete technology and were historically a massive commercial failure... The Wankel only briefly saw very limited success in automobiles but even Mazda, who the very last manufacturer in the world abandoned the Wankel engines a decade ago and production ceased completely in 2012.
    1
  3167. @Márton Léránt Reciprocating engines dominate the Ultra-light market because they are MORE affordable than Wankel engines and offer superior performance and reliability at a lower cost.
    1
  3168. @Márton Léránt WRONG! Wankel engines have MORE parts than 2-stroke reciprocating engines and offer more power at a much lower cost.
    1
  3169. @Márton Léránt One only has to look at the world's largest supplier of ultra-light engines, Rotax... pioneers in the Wankel design they abandoned the Wankel in favor of the reciprocating engine.
    1
  3170. @Márton Léránt The failure of the Wankel engine is not a matter of affordability... but of profitability. 26 of the largest and best engine manufacturers in the world became Wankel KKM licensee's to develop the Wankel engine for mass production, All of them have abandoned the Wankel engines including Mazda because they could not be sold profitably... you can't make money selling an inferior product that consumers tell you they do not want buy.
    1
  3171. @Márton Léránt It is impossible to mass produce a commodity that no one wants to buy, in a free economy only the best products are made... those that are inferior are discontinued or never enter production.
    1
  3172. @Márton Léránt You cannot compare the power-to-weight ratio of an engine that does not exist, there are no certified air-worthy Wankel aircraft engines available on the market. In applications where power-to-weight ratio performance is critical? Only Gas Turbines are used... in all other applications reciprocating engines are used.
    1
  3173. @Márton Léránt That is because you simply do not understand how engines are manufactured, a typical 2-stroke engine can be manufactured using ordinary, readily available machining tools while the Wankel require specially designed, purpose built tooling.
    1
  3174. @Márton Léránt This is because many amateur fans of the Wankel type engine subconsciously tend to omit all the tiny, very fragile seal components that cause all of the Wankel engine's serious reliability problems. I would love to quote you the power-to-weight ratio of the best FAA certified Wankel aircraft engine... but as I mentioned previously, none exist. The Wankel is too unreliable and is not efficient enough for aircraft use... making the argument that it offers better power-to-weight ratio performance compared to reciprocating engines completely moot.
    1
  3175. @Márton Léránt YES, there are no Wankel engines available that meet the reliability standards required to meet FAA or EASA air-worthiness certification. Wankel engines are very poorly suited to aircraft applications and this is why there are no aircraft manufacturers anywhere in the world that produce aircraft with them and never have been.
    1
  3176. @Márton Léránt There is simply no reason to, the old myth that Wankel engines offered any advantage in power-to-weight ratio performance was simply not true.... and furthermore, any perceived advantage is completely nullified by the Wankel's significantly higher fuel consumption which requires higher wet take-off weight, reduced range and/or reduced payloads compared to aircraft fitted with reciprocating engines. There are simply no real world advantages which is exact why no aircraft manufacturer uses Wankel engines in certified flight-worthy aircraft. Wankel engines are obsolete in the engine manufacturing industry and were never manufactured for aircraft applications.
    1
  3177. @Márton Léránt The Wankel engine offers NO ADVANTAGES.. and this is why the design is OBSOLETE in the engine manufacturing industry.
    1
  3178. @Márton Léránt Then please explain why Gas Turbines and reciprocating are both more reliable than Wankel engines???
    1
  3179. @Márton Léránt An interesting theory but not one you have presented with any evidence... Wankel engines are significantly less reliable and have much shorter service life than comparable reciprocating or turbine designs, this is an irrefutable fact.
    1
  3180. @Márton Léránt "No, this is what is not relevant "COZ WANKELS ARE BETTAH" The fact that Wankel engines have been developed for aircraft use over 60 years but failed to become commercially viable proves conclusively that they are NOT BETTER....
    1
  3181. That is why they are no longer in production... they are obsolete in the engine manufacturing industry.
    1
  3182. This month marks the 10 year anniversary of Mazda's decision to cancel the RX-8, the entire failing RX brand and cancel further development of production Wankel engines... Mazda unveiled its very last Wankel engine 25 years ago.
    1
  3183. Mercedes-Benz M950F Wankel engine
    1
  3184. @Roy Hsieh Actually the Wankel is obsolete because of the terrible combustion and thermodynamic efficiency problems for which no solutions exist.
    1
  3185. Wow, I just remembered why I don't watch CBS news anymore... Fake news.
    1
  3186. Suspended driving license?
    1
  3187. You were lucky... most of them die from engine failure... something not covered by insurance
    1
  3188. Particulates can be observed as black soot... the other emissions like NOx are completely invisible, at least until they are exposed to sunlight in the atmosphere and form photo-chemical smog.
    1
  3189. I feel really bad for that guy, someone needs to get him into drug rehab.
    1
  3190. An LS or a 2JZ swap would be a great RX-7 project...
    1
  3191. An LS engine stock produces 50% more power and DOUBLE the torque... more reliable, cheaper and all around just plain better... which is why it has become a popular solution for dealing with under-powered, unreliable Wankel engine which is not even made anymore.
    1
  3192. Long since dead... Mazda discontinued them several years ago... no longer in production anywhere in world
    1
  3193. Not rare... just less common.
    1
  3194. Not the only serios error in the title, this is a WANKEL engine... Not a Rotary engine.
    1
  3195. The RX-7 was discontinued years ago... because its engine is a serious disadvantage.
    1
  3196. NOT ANYMORE... EPIC FAIL
    1
  3197. Not very long, these little 49PI Graupner engines were very troublesome.
    1
  3198. Unfortunately the video was filled by a lot of errors and misinformation... Wankel engines are not used in aircraft applications... just a handful of experimental prototypes. Wankel engine are also obsolete in the engine manufacturing industry. Cheers!
    1
  3199. Nah, these POS engines were just horribly unreliable
    1
  3200. Arrest Obama! Arrest Schillery Clinton!!!
    1
  3201. Emissions had nothing to do with the Wankel becoming obsolete... Mazda discontinued the RX brand BECAUSE NO ONE BOUGHT THEM.
    1
  3202. why?
    1
  3203. Electric scooters are a dumb idea...
    1
  3204. "Room for improvement???" Can you please elaborate on what you meant by that?
    1
  3205. @Fab Bri Indeed, but its many flaws are also inherent to its fundamental geometry that allows it function as an engine in the first place... My question is what room is there for substantial improvements when these flaws cannot be mitigated due to the limited geometry envelope and fundamental shape? Giant companies like Mercedes-Benz, General Motors and Ford spent billions of dollars developing the Wankel KKM and like all 26 KKM licensee's came to the same conclusions in the end... that the Wankel offers no further development potential, even Mazda was final forced to conceded.
    1
  3206. Apex seals are wasted... time for a new engine _No, sorry. I mean new car!_.
    1
  3207. Your best option is to sell the RX-8 before it no longer starts... buy something better if you can afford it.
    1
  3208. We are talking about a 2.5 liter that is more efficient than the engine in the Toyota Prius...
    1
  3209. They are no longer made, Wankel engines are obsolete now
    1
  3210. +Schwinn Jumper Indeed.. but it is still a little sad that so many people do not know the difference between a Wankel and a Rotary engine....
    1
  3211. +Schwinn Jumper Wankel engines are antiques now too... they have been obsolete in the automobile and engine manufacturing industries for several years now...
    1
  3212. +Schwinn Jumper Oh yeah, I know about the Wankel. Antiques those are nowadays. Awesome to build though if you can get a plane that has one installed from the factory.
    1
  3213. +Schwinn Jumper I'm sorry but you are obviously very confused and misinformed. Mazda canceled all research and development of Wankel engines back in in May of 2009. The Wankel has been completely obsolete in the automotive and engine manufacturing industry for several years now... where have you been? Living under a rock????
    1
  3214. +Schwinn Jumper One of the major fundamental design flaws in the Wankel KKM engine is the low static compression limit.... it is also why Wankel engines cannot be adapted to use the Diesel cycle or be adapted to use GDI technology.
    1
  3215. +Schwinn Jumper Sales of the Mazda RX brand had been in steady decline since 1986... the sales of the very unpopular RX brand had not produced a profit for the company in DECADES its board of directors had no choice but to ax the RX brand or face losing the company to another bankruptcy sale like in the 1970's when Ford bought the company from a Japanese bankruptcy court after Mazda's failed attempt to market an all Wankel powered product line.
    1
  3216. @Jacob Webb My condolences to you sir... the joke is on you now Lol!
    1
  3217. 3.9 liter engine... very disappointing power output.
    1
  3218. It was the last RX car to be turbocharged because of reliability problems. Mazda developed a turbocharged version of the Renesis but did not introduce it into production because of reliability concerns and the fact that sales of the RX-8 became a major flop.
    1
  3219. No longer available, Wankel engines are obsolete.
    1
  3220. The Wankel is MORE complex and had more parts than a typical RC engine in this class...
    1
  3221. Nothing more expensive and has lower range performance than a electric vehicle...
    1
  3222. Sorry, been out of production for a long time
    1
  3223. Looks like another vaporware scam just like the Moller Skycar.
    1
  3224. Mercedes-Benz unveiled their HCCI engine 10 years ago...
    1
  3225. https://en.wikipedia.org/wiki/Mercedes-Benz_F700
    1
  3226. I thought Peter Fonda died years ago
    1
  3227. All Wankel engines use the same 4-stroke operating principle as the Otto engine.
    1
  3228. Actually this is a Wankel engine to be correct. Lubricant is mixed with the special fuel that model engines like these use. Yes, apex seals are notoriously unreliable and is a major factor in these engines becoming obsolete.
    1
  3229. Mazdas are cheap disposable cars.
    1
  3230. Indeed, that's why no one produces them anymore
    1
  3231. 1.3 liters of "taxable displacement" the Mazda 13B had an actual total displacement of 3.9 liters
    1
  3232. @BoogieDownProduction Independent testing shows that the highest crash safety ratings are the European manufacturers.
    1
  3233. @BoogieDownProduction I am really starting to thing you are an asshole troll that knows nothing about cars...
    1
  3234. BMW, Mercedes, Audi and Volvo top the list of safest cars. https://cars.usnews.com/cars-trucks/safest-car-brands
    1
  3235. I wouldn't want to be in either one of those cars during a crash...
    1
  3236. No, not really. All Wankel engines operate using the 4-stroke principle.
    1
  3237. @V L Complete and utter nonsense, All Wankel engines use the exact same 4-stroke operating principle as the Otto engine does... you need to learn how the Wankel KKM engine works.
    1
  3238. Tesla cars suck... that is not a secret
    1
  3239. Indeed, Wankel engines typical require a richer AFR than an Otto engine and "nitro" fuel engines can run anywhere in the 3:1 to 10:1 range Much richer than a reciprocating 4-stroke running on gasoline that averages around 14:1
    1
  3240. John because apex seal are one of the fatal flaws in the Wankel engines and a major reason why they are obsolete today.
    1
  3241. That is right silly lad, its no longer a problem ... no one sells Wankel engines anymore... NOT EVEN MAZDA!!! Lol!!!!
    1
  3242. Why are you in such denial of the truth Johnny??? Just go down to the local Mazda dealer and see for yourself, Mazda does not make Wankel engines anymore.... no one does.
    1
  3243. @Jesse Vandell Apex seals are the parts that FAIL FIRST!!! Burning oil causes carbon build-up...
    1
  3244. @Vladimir Lucifer I didn't know you were Gay.
    1
  3245. @Vladimir Lucifer Its OK to be GAy... especially if you drive an RX! Lol!!!
    1
  3246. @Vladimir Lucifer I would never buy one of those shitty cars... only gay people and people that know nothing about cars.
    1
  3247. @Vladimir Lucifer ESPECIALLY look it up so you don't look like a fool again.
    1
  3248. @Vladimir Lucifer So you "suck" at being gay too? Lol!!! * Really? because you are the one that has exposed yourself as being ignorant about automobiles and for being gay... looks like you are your own worse enemy son...
    1
  3249. @Vladimir Lucifer Girl, it sounds like you know even less about cars than being gay.
    1
  3250. @Vladimir Lucifer Who blew their RX-7??? I don't blow anything... I'll defer to your expertise if I want to know about blowing something.
    1
  3251. @Vladimir Lucifer You have already admitted to all the stereo types girl, that all rotards are gay and know nothing about cars.
    1
  3252. @Voldimort Lucifer The only argument here was if Diesel emissions were making frogs gay... and you busted in to announce what we are ready know... that Mazda makes cars for gays.
    1
  3253. @Voldimort Lucifer YES, you have exposed yourself as being ignorant about cars and vaginas...
    1
  3254. @Voldimort Lucifer Are you alone with little boys???
    1
  3255. @Cory Mck "Diesel emissions are making the frogs gay" I hope that puts everything into proper perspective for you...
    1
  3256. @Cory Mck Are you implying that a minor could not be diagnosed or charged as a pedophile??? I certainly hope not...
    1
  3257. @Cory Mck Dude, you seriously need to lighten up and get a life...
    1
  3258. @Cory Mck Diesel emissions are making the frogs gay
    1
  3259. @Cory Mck You don't intimidate me son, you are nothing but an angry little troll.
    1
  3260. @Cory Mck But what about the gay frogs???
    1
  3261. @Cory Mck "Fresh Pasta"
    1
  3262. @Cory Mck You must be a very naive person... you seem unaware of the significance of "Voldimort Lucifer" and "Fresh Pasta".
    1
  3263. @Cory Mck What is wrong with you? Are you a member of NAMBLA??? YOU SICK PIECE OF SHIT!
    1
  3264. Actually Felix Wankel had nothing to do with the design of the KKM-57 engine used by Mazda and others... it was the engineering creation of Hanns Paschke and Walter Freode who built the prototype without the knowledge or any assistance from Felix Wankel. Felix Wankel hated this engine design which was very crude and nothing like his very elegant DKM-54 which was a true Rotary layout... the KKM-57 is not a real Rotary design. Ironically the KKM revs lower than comparable 2-stroke engines. True, the Wankel engine is inherently flawed particularly in terms of efficiency and durability.... performance was above average compared to 4-stroke reciprocating engines in the 1950's and 60's but by today standards offers mediocre power-to-weight and power density... it fuel and combustion efficiency is deplorable.
    1
  3265. All Wankel KKM type engines use the 4-stroke operating principle, unfortunately due to the Wankel's terrible combustion chamber design and poor combustion efficiency premixing the oil into the fuel causes some much more serious disadvantages than a reciprocating two stroke, plus because most Wankel engine are unlike 2-strokes and still have a wet sump so additional oil is not required to lubricate the crankshaft bearings which is why oil injection is the preferred (and more accurate)method, and was only method used by Mazda.
    1
  3266. One of the fundamental flaws in the Wankel design was the troublesome shape of its internal components... cylinders and spherical shapes are ideal for ensuring even and consistent thermal expansion and contraction and the clearances between the moving parts, stationary parts and most importantly the sealing parts... Like the Newcomen steam engine, one of the Wankel's major flaws is that it is required to maintain high temperatures and colder temperatures with in the same housing, high wear rates and low thermal efficiency is the end result.
    1
  3267. Without Exhaust After-treatment YES, compared to Otto engines Diesel engines produce very little HC and CO emissions (they were completely exempt from emissions controls in California until 1997) but in terms of NOx and particulate emissions Diesel are worse... not a big issue in rural areas or cold wet climates... but in some large urban areas it can cause serious air quality issues.
    1
  3268. Fuel is MUCH CHEAPER in the U.S. and Diesels cost more... I owned a Diesel 1984 Ford Ranger... Skyline didn't meet emissions or safety regulations in many countries but still allow limited edition cars as exempt, it did not warant the extra expense of building a EPA/CARB compliant version... it would not pay for itself.
    1
  3269. That same argument works both ways... if the price of gasoline and taxes were the same in Germany as in the U.S.??? You would see a lot more Chevrolet Corvettes on the autobahns.
    1
  3270. Yes, Tesla Motors is heavily subsidized by both Federal and many State governments through taxpayer funds.
    1
  3271. @Yoseob Yang Indeed, you need to have a high I.Q. level to be an engineer... while anyone can be a "rotard"
    1
  3272. Sounds more like a weedwacker with a broken exhaust...
    1
  3273. Why would that make any difference?
    1
  3274. Wankel engines had never low efficiency, which is why they became obsolete
    1
  3275. A 1.0 liter that makes 200+ Hp???? Please cite an example?
    1
  3276. The Mazda 13B engine has an actual displacement of 3.9 liters...
    1
  3277. A lot of people say that... but they don't seem to ever love them enough to buy them...
    1
  3278. These engine were always very expensive, Graupner GmbH. discontinued them years ago due to poor sales so they are difficult to find no matter where you live.
    1
  3279. They don't anymore... the very last manufacturer of Wankel engines was Mazda and they abandoned production 7 years ago.
    1
  3280. not very reliable either..
    1
  3281. Not a very good first car.
    1
  3282. It becomes a PNEUMATIC Motor...
    1
  3283. Mazda permanently discontinued the RX brand because of the inherent flaws that plagued the obsolete Wankel engine.
    1
  3284. Mazda needs to make cars that actually sell at a profit... the troubled auto maker who's main business is making cheap entry level economy cars has faced increasing market pressure from Korean and Chinese auto makers.
    1
  3285. After some serious market research Mazda has finally accepted the fact that RX fans are a demographic group comprising mostly poorly educated, low income, bad credit individuals that don't actually buy new cars.
    1
  3286. Mazda makes shitty cars.
    1
  3287. Well technically they cheated but the real reason they won was pure luck... all the points leaders crashed out early in the race.
    1
  3288. Heavy for a 1 hp RC engine, not reliable either.
    1
  3289. Nothing fun about getting a ride back to the dealer in a tow truck after the apex seals blow...
    1
  3290. Indeed, Mazda totally missed the mark on the FD in a vain attempt to keep the RX brand alive, Mazda has never been able to pull off the public perception of being a high-end performance/luxury marque. The RX-7 had always been dirt cheap and you got what you paid for, a fun (but disposable) little sports car.
    1
  3291. +scottjinx The Wankel engine IS DEAD... Remember?
    1
  3292. You can try to find an old one because Wankel engines are not produced anymore... Make your own? A lot of people try but quickly learn why they never became popular..
    1
  3293. Prototype engines were built with up to 9 chamber in a row... but proved impractical. The more chambers the less reliable the engine is, they had very poor reliability to start with.
    1
  3294. You mean a "VCR" system? The variable compression ratio by means of a adjustable the piston deck height already exists.
    1
  3295. Liberism is a plague upon this great nation... throw out the socialist crooks!!!!
    1
  3296. Won on sheer luck, points leaders crashed early in the race, the Mazda 787B had a terrible racing record, 20 losses in 21 races, no poles, no fastest laps. never won a series championship.
    1
  3297. Audi has won Le Mans NINE TIMES with a Diesel engine...
    1
  3298. The Wankel design cannot support Diesel cycle compression ignition.
    1
  3299. Actually they have more parts than a comparable 2-stroke reciprocating RC Engine, higher cost, lower reliability and power along with higher fuel consumption were all major disadvantages... they simply did not sell very many and were eventually discontinued.
    1
  3300. Indeed... the RX-8 looks even uglier now.
    1
  3301. Unfortunately the Wankel design was found to have very little further development potential, all of the Wankel engine manufacturers (including Mazda) have abandoned this obsolete design.
    1
  3302. Hell no! I know better... everyone knowledgeable in the automotive industry knows how bad they were... its definitely a car that enthusiasts should avoid buying.
    1
  3303. One power cycle per revolution of the crankshaft.. 3:1 ratio
    1
  3304. Indeed it is... the Wankel is obsolete in manufacturing because it has very poor combustion characteristics and efficiency.
    1
  3305. Did you do a lot drugs back in the 1970's????
    1
  3306. The Wankel is obsolete in the engine manufacturing industry because it was inferior to reciprocating engines and could no longer compete with superior engine concept that is still mass produced in the millions.
    1
  3307. Hey crackpot Ernie Brink! WHY doesn't your engine run????
    1
  3308. Here in California we already have a solar energy glut during mid-day hours and now have an even larger shortage of peak period power in the evenings when solar production drops of the grid... causing even higher electric rates through out the entire state.
    1
  3309. Then why is the MX-5 a Best Seller and the RX-8 discontinued after being an embarrassing sales failure.
    1
  3310. Ugly cars tend to sell poorly... so do cars with a notoriously bad reputation for premature engine failure like the RX-8 did.
    1
  3311. And WTF was that logic? So basically what you are saying is that everyone that bought an RX-8 was too stupid to properly care for it??? LOL Dumb Logic Dude!!!
    1
  3312. You mean Wankel engines??? has nothing to do with maintenance, Mazda's CEO said they were unreliable and the NHTSA recall investigation proved it. The RX-8 didn't sell well because it was not a real sports car, its was ugly, got terrible mileage despite it mediocre power and lack of torque, poor build quality and YES, after the cars developed a bad reputation for engine failure sales dried up completely. The MX-5 is still for sale and is still a top seller, the RX-8 was canceled because you could buy a better looking car with better performance for the same money.
    1
  3313. No, you really don't... unless you like to pedal everywhere.
    1
  3314. +D Bullshite... Tesla makes all kinds of false claims to boost its stock prices... because the company still does not make a profit despite billions in subsidies.
    1
  3315. THEY DID!!! Several manufacturers offered Wankel powered tools but they were aweful... just terrible! Sachs made chainsaws, generators, air compressors and lawnmower engines and Yanmar made yard and farm tools too... all were epic failures.
    1
  3316. Actually reciprocating 2-stroke engines offer far better power-to-weight ratio, compact and lighter than the Wankel, most important they are far more reliable and easier to start... cheaper too. The Wankel simply could not compete in this market.
    1
  3317. True, the Wankel was just a gimmick... in reality it was a massive commercial failure... reciprocating engines still dominate. Electric tools are great for amateur DIYers but lack much to be desired in a serious professional grade tools.
    1
  3318. I buy internal combustion tools... because power cords can be an issue.
    1
  3319. Felix Wankel did not design this engine (the KKM) The KKM was developed by Hanns Paschke who was Wankel's collegue at NSU
    1
  3320. GM licensed the Wankel KKM design from NSU motorenwerkes GmbH (now Audi) GM shelved the Wankel engine because of reliability problems and terrible fuel economy.
    1
  3321. But explain why Wankel engines have never been sold commercially in fixed rpm applications??? Wankel engines are an obsolete technology that is no longer manufactured anywhere in the world today... Even Mazda abandoned the Wankel engine a decade ago.
    1
  3322. Mazda no longer manufacturers Wankel engines and ceased all development of production engines in May, 2009... the last prototype ever made was last seen 11 years ago and no new prototypes exist.
    1
  3323. Still spreading false rumors about Wankel engines that do not exist??? You realize that all of your false predictions have never come true... every year they turn out to be nothing buy fantasy tales and outright lies.
    1
  3324. Not really, all of the best production UAVs use reciprocating piston engines made by Rotax... most of the vaporware Wankel scams have gone defunct now.
    1
  3325. Childish insults won't make you look very mature... or prove your false rumors!!!
    1
  3326. Jonny your fake rumors cannot change the truth.
    1
  3327. Fake rumors don't come true Johnny!
    1
  3328. The Wankel engine is obsolete today because it offer less power, less torque and less efficiency. The answer is the Wankel design was simply inferior to other ICE designs still available and because it was plagued by several inherent design flaws that limited its efficiency, development potential and reliability.
    1
  3329. I think you are confusing the "Tax Displacement" method often used for automotive Wankel engines with the true, or total displacement... this for example (eg; the Mazda 13B series) a taxable displacement of only 1.3 liters despite it true, total displacement of 3.9 liters (3,924cc) The displacement issue gets a little more complicated when you want to compare Relative Displacement with a 4-stroke Otto or Diesel engine at the prescribed 720° firing order cycle.
    1
  3330. It is possible to buy a production automobile (reciprocating Otto engine) with as high as 200 horsepower per liter and racing engines that produce 1,000 horsepower per liter... the Wankel no longer offered any significant development potential in terms of power output without serious problems in reliability and service life.
    1
  3331. That is why they don't make them anymore... shit engines.
    1
  3332. +L Parker Regardless of the fuel type the Wankel KKM design had a significantly lower Carnot Cycle efficiency limit, this can be easily observed in the higher EGTs (T2) temperatures in the Wankel compared to other ICE types which are more efficient (and still in production)
    1
  3333. Mazda dropped the troublesome Wankel engine like a bad habit.
    1
  3334. Mazda's CEO confirmed that the RX-9 was a hoax... it was nothing but a false rumor started by bloggers...
    1
  3335. All Wankel engines use the same 4-stroke operating principle as a reciprocating Otto engine.
    1
  3336. It takes 1080° of crankshaft rotation for each of the 3 faces of the triangular piston to complete the 4-strokes. This is due to the 3:1 gear ratio between the fixed gear and the piston/rotor gear.
    1
  3337. Mazda Vision Coupe Skyactiv-X 4-Cylinder Next Generation Technology. https://insidemazda.mazdausa.com/newsroom/2017-tokyo-motor-show/
    1
  3338. 124 mile range is terrible... why would anyone pay the same price for a vehicle with LESS performance???
    1
  3339. How long can manufacturers afford to offer cars like these that sell at a net loss and lose money for the company... these cars only exist because of massive taxpayer subsides and corporate tax write-offs... Its not a sustainable business plan... its just comply with state mandates which may be repealed.
    1
  3340. Plug-in EVs are not the only Zero Emission option, Cars like the Honda Clarity, Toyota Mirai and the Hyundai Nexo all offer better range performance and can be refueled in minutes.
    1
  3341. +movement2contact Why do you think anyone buys an EV in the first place... if it wasn't for slick marketing no one would pay that kind of money for a car with inferior performance and value.
    1
  3342. +movement2contact PS: did you know why there will never be electric commercial aircraft?
    1
  3343. +dzonikg A lot of electric cars had range of 100 miles or more BUT... they typically had horsepower ratings of just 1 or 2 horsepower, top speeds of 15 MPH or less and many weighed less than 1000 pounds. EVs quickly became uncompetitive after 1915 due to the invention of the electric starter for ICEs... which completely eliminated the inconvenience and risk of bodily injury or death and undermining the primary advantage of the EV... ease and safety of starting.
    1
  3344. +dzonikg If the gas car had modern electric starter? I would without any doubt make the same decision that 99.9% of new car buyers still make today and choose the internal combustion car over the electric.
    1
  3345. Gasoline engine cars were always cheaper, once the Charles Kettering solved the serious disadvantage of the internal combustion car by inventing the electric starter motor, steam cars and electric cars no longer had any significant advantages, the ICE car won and remains the superior design. Both steam and electric cars died-out after 1915 with the introduction of Kettering's starter motor with many steam and electric automakers switching to internal combustion engines or going bankrupt. (the worlds largest steam car company 'White Motors' switched to ICE's and remained until merging with Volvo in the 1980's.)
    1
  3346. This is a Wankel KKM engine, manufactured by Graupner GmbH. Felix Wankel had nothing to do with its development... in fact he hated these non-rotary Wankel engines that were created by Hanns Paschke and Walter Froede in 1957. He was also bitter that his Rotary version never saw production.
    1
  3347. Indeed, Elon Musk is now worth $26 billion dollars and wants another $55 Billion! electric rates and taxes continue to rise... while he gets richer
    1
  3348. @Dazed Maestro "Stupid or ignorant" Don't forget corrupt too...
    1
  3349. Because battery electric vehicles are fatally flawed and will never replace internal combustion engines.
    1
  3350. Better? absolutely False, While electric motors can achieve up to 97% efficiency... rechargeable batteries are certainly not energy efficient or environmentally freindly.
    1
  3351. "We just have to improve the energy density of the batteries." Wow! I wish I had a dollar from every time I heard that benighted remark... Unless you discover a new stable element on the Periodic Table that has significantly more electrons in its valance than Silver or Copper??? Battery energy density will never be enough to replace liquid fuels like hydrocarbons.
    1
  3352. Clearly you are not educated in the fields of science and engineering.
    1
  3353. "The next 10 years are going to be very exciting." Someone said that exact same thing to me 10 years ago... and they were just as wrong then as you are right now.... BEVs account for less than 1% of the global vehicle fleet... a mere fraction of the its market share over 100 years ago.
    1
  3354. Then why do pretend to be knowledgeable regarding rechargeable battery development??? Wrong, nearly one third of all the automobiles were battery-electric prior to 1915... until Charles Kettering invented the automatic electric starter for internal combustion cars... rendering electric cars obsolete over night. While electric vehicles remained in relatively few specialty niche applications it has never been competitive with ICEs. Now that society has been poisoned by fake news and the emergence of radical quasi-religious political environmentalism... we have EVs that are mandated by law and lose money despite massive tax subsidies. Its called fake news and dumbing-down in the _Information Age_.
    1
  3355. Wow! You really don't know anything about batteries do you... how can you be so confident about a technology when you don't know anything about it. 360mJ (100 kW/hr) of worth of petroleum weighs just 35 lbs... Do you know what the best rechargeable car battery (Tesla model S 100D) weighs?
    1
  3356. What you are eluding to is everything you know about rechargeable battery technology is wrong and comes from dodgy investment scams and political rhetoric. Because I can read the Table of Periodic Elements carbon does not have more free electrons in its valance ring than Silver or copper... and these materials cannot match liquid hydrocarbons.
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  3357. The Tesla's battery weighs a staggering 1,440 lbs!!!! that is three quarters of a TON! and it only stores the same energy as 8 gallons of petroleum weighing 35 lbs. If battery density is "inching forward" it still has MILES TO GO and it has to compete with improvements in internal combustion engines leaving no net gain.
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  3358. "big car companies are onbaord with EVs" They are??? Really? because those are same people that said we would have electricity too cheap to meter and drive supersonic flying cars...
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  3359. The same people said we would all be driving electric cars by 2020... Lol!!!
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  3360. So you didn't know??? The big car companies do not want to sell EVs.
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  3361. I don't see any affordable electric cars... that are not glorified golf carts...
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  3362. Norway is not a model that can never work in the rest of the world, its a socialist country that does not have a true free market economy... It has a surplus of hydro power and sells its large petroleum production for export to be burned elsewhere... Norway has serious air quality issues because most homes still burn wood for heating...
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  3363. Wow! serious... So you didn't know that they are already forced to sell EVs... do you live in some kind of delusional fantasy world where everything you know comes from advertising, fake news and radical socialist politics??? Talks is cheap, China is more than 50 years behind the West in terms of vehicle emissions and air quality standards. Germany and the UK have not passed any legislation banning ICE cars. France just rejected the ICE ban by rioting in the streets... the French government has done a complete 180° on its carbon emissions policy and Greece has also shelved its ban indefinitely. So please spare the "new green deal"fantasy bullshit... its just a scam to double the price of cars, energy and taxes and make people like Elon Musk another $25 BILLION dollars richer... I can't believe people are really that stupid.
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  3364. So? What is your point? Yeah, you say a lot of things that are not true... That's right, China does not have a free market economy and they could care less if you lose your job to someone in China. Really, because someone said 15 years ago China would be making cars that would meet US vehicle emissions... but they still don't. True, because China simply dumps its toxic waste from solar panel manufacturing... they and Elon Musk don't give two shits about the environment... just fooling suckers like one into handing over all your money for products that cost more and deliver less... You mean the people that expose the fake news and government corruption like legislating and officially endorsing products that are not commercially viable and need to be subsidized with taxpayer funds... no matter how you slice it... its still corruption.
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  3365. Very few countries do care about the environment... most countries are concerned with making money and forcing people to pay more for inferior technology based on a false sense of fear of global destruction or religious beliefs that you are a bad person if you don't live in fear of it. Elon Musk didn't found Tesla... he stole it from the guy that did, and when that guy tried to start his own company again (Fiskers) Musk sued him. Musk was fired from Paypal because he was lining his pockets with investor funds... the same scam he is running at Tesla.
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  3366. The ozone hole threat is a hoax... no accurate model to predict its behavior has ever been produced...
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  3367. You wrote; quote "If Elon only cared about money then why did he make all the Tesla patents free and open for any company to use." Why did Musk sue Fiskers????
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  3368. Musk has been fired or forced out of every company he has ever worked for... he is a liar and a crook.
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  3369. Musk was fired from his own companies TWICE! from both Zip2 and Paypal... he is currently under intense pressure from investors to leave Tesla and his company SpaceX is in serious financial trouble with another round of layoffs expected soon.
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  3370. Let Elon tell it himself that he was fired from Paypal Elon Musk Talks About Getting Fired As Paypal CEO watch it here; https://www.youtube.com/watch?v=wKacw4zHj-Q
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  3371. Indeed, the "Ozone Hole" has never behaved as predicted by the model which the doomsday hoax was based on...of course billions of dollar were made based on these false predictions.
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  3372. Sorry Tony, a 4-stroke Otto engine has a power stroke every TWO revolutions of the crankshaft. The Wankel engine has 3:1 ratio THREE-to-ONE While a 4-stroke completes its entire firing order sequence in 720° of crank rotation the Wankel requires 1080°. The best engineers in the world have discovered that the Wankel no longer has any potential, even Mazda have abandoned the design a decade ago.
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  3373. Wrong, there is only one power stroke per crankshaft revolution, not 3... you need to learn how the Wankel engine works.
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  3374. That's a very naive statement, you seem to be completely aware of the long and extensive development history of the Wankel engine. No engine design in the 20th century has ever received so much R&D... The truth is the Wankel simply never delivered on its promise of replacing reciprocating engines and turned out to be a major disappointment... a massive commercial failure.
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  3375. IT WAS popular... when the Wankel KKM was introduced there was massive interest and in the 1960's and early 70's the biggest engine manufacturers in the world rushed to bring their version to production but less than a decade later the Wankel proved to be cursed with terrible problems that could never be solved.
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  3376. Not everyone can have good taste...
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